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Finding the Fourth Proportional to 58,478.26, 87,724.25 and 20,515.92

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Solution

The fourth proportional to 58,478.26, 87,724.25 and 20,515.92 is: 30,776.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,478.26 : 87,724.25 = 20,515.92 : x
  2. Step 2: Convert to fraction form
    58,478.26/87,724.25 = 20,515.92/x
  3. Step 3: Cross multiply
    58,478.26x = 87,724.25 × 20,515.92
  4. Step 4: Simplify right side
    58,478.26x = 1,799,743,592.48
  5. Step 5: Solve for x
    x = 1,799,743,592.48/58,478.26
  6. Step 6: Final answer
    x = 30,776.28

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