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Finding the Fourth Proportional to 30,929.80, 42,682.80 and 16,782.70

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Solution

The fourth proportional to 30,929.80, 42,682.80 and 16,782.70 is: 23,159.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,929.80 : 42,682.80 = 16,782.70 : x
  2. Step 2: Convert to fraction form
    30,929.80/42,682.80 = 16,782.70/x
  3. Step 3: Cross multiply
    30,929.80x = 42,682.80 × 16,782.70
  4. Step 4: Simplify right side
    30,929.80x = 716,332,627.56
  5. Step 5: Solve for x
    x = 716,332,627.56/30,929.80
  6. Step 6: Final answer
    x = 23,159.95

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