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Finding the Fourth Proportional to 31,003.97, 42,786.02 and 16,856.91

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Solution

The fourth proportional to 31,003.97, 42,786.02 and 16,856.91 is: 23,262.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.97 : 42,786.02 = 16,856.91 : x
  2. Step 2: Convert to fraction form
    31,003.97/42,786.02 = 16,856.91/x
  3. Step 3: Cross multiply
    31,003.97x = 42,786.02 × 16,856.91
  4. Step 4: Simplify right side
    31,003.97x = 721,240,130.54
  5. Step 5: Solve for x
    x = 721,240,130.54/31,003.97
  6. Step 6: Final answer
    x = 23,262.84

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