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Finding the Fourth Proportional to 30,908.20, 42,650.18 and 18,972.04

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Solution

The fourth proportional to 30,908.20, 42,650.18 and 18,972.04 is: 26,179.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,908.20 : 42,650.18 = 18,972.04 : x
  2. Step 2: Convert to fraction form
    30,908.20/42,650.18 = 18,972.04/x
  3. Step 3: Cross multiply
    30,908.20x = 42,650.18 × 18,972.04
  4. Step 4: Simplify right side
    30,908.20x = 809,160,920.97
  5. Step 5: Solve for x
    x = 809,160,920.97/30,908.20
  6. Step 6: Final answer
    x = 26,179.49

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