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Finding the Fourth Proportional to 647,352,010.10, 971,028,015.15 and 388,859,107.70

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Solution

The fourth proportional to 647,352,010.10, 971,028,015.15 and 388,859,107.70 is: 583,288,661.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,352,010.10 : 971,028,015.15 = 388,859,107.70 : x
  2. Step 2: Convert to fraction form
    647,352,010.10/971,028,015.15 = 388,859,107.70/x
  3. Step 3: Cross multiply
    647,352,010.10x = 971,028,015.15 × 388,859,107.70
  4. Step 4: Simplify right side
    647,352,010.10x = 377,593,087,522,931,072
  5. Step 5: Solve for x
    x = 377,593,087,522,931,072/647,352,010.10
  6. Step 6: Final answer
    x = 583,288,661.55

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