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Finding the Fourth Proportional to 38,285.87, 57,428.76 and 11,992.66

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Solution

The fourth proportional to 38,285.87, 57,428.76 and 11,992.66 is: 17,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,285.87 : 57,428.76 = 11,992.66 : x
  2. Step 2: Convert to fraction form
    38,285.87/57,428.76 = 11,992.66/x
  3. Step 3: Cross multiply
    38,285.87x = 57,428.76 × 11,992.66
  4. Step 4: Simplify right side
    38,285.87x = 688,723,494.30
  5. Step 5: Solve for x
    x = 688,723,494.30/38,285.87
  6. Step 6: Final answer
    x = 17,988.98

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