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Finding the Fourth Proportional to 31,412.92, 47,118.30 and 8,039.56

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Solution

The fourth proportional to 31,412.92, 47,118.30 and 8,039.56 is: 12,059.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,412.92 : 47,118.30 = 8,039.56 : x
  2. Step 2: Convert to fraction form
    31,412.92/47,118.30 = 8,039.56/x
  3. Step 3: Cross multiply
    31,412.92x = 47,118.30 × 8,039.56
  4. Step 4: Simplify right side
    31,412.92x = 378,810,399.95
  5. Step 5: Solve for x
    x = 378,810,399.95/31,412.92
  6. Step 6: Final answer
    x = 12,059.06

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