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Finding the Fourth Proportional to 76,921.92, 115,382.88 and 21,517.92

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Solution

The fourth proportional to 76,921.92, 115,382.88 and 21,517.92 is: 32,276.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,921.92 : 115,382.88 = 21,517.92 : x
  2. Step 2: Convert to fraction form
    76,921.92/115,382.88 = 21,517.92/x
  3. Step 3: Cross multiply
    76,921.92x = 115,382.88 × 21,517.92
  4. Step 4: Simplify right side
    76,921.92x = 2,482,799,581.21
  5. Step 5: Solve for x
    x = 2,482,799,581.21/76,921.92
  6. Step 6: Final answer
    x = 32,276.88

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