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Finding the Fourth Proportional to 92,213.40, 138,449.70 and 57,221.40

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Solution

The fourth proportional to 92,213.40, 138,449.70 and 57,221.40 is: 85,912.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,213.40 : 138,449.70 = 57,221.40 : x
  2. Step 2: Convert to fraction form
    92,213.40/138,449.70 = 57,221.40/x
  3. Step 3: Cross multiply
    92,213.40x = 138,449.70 × 57,221.40
  4. Step 4: Simplify right side
    92,213.40x = 7,922,285,663.58
  5. Step 5: Solve for x
    x = 7,922,285,663.58/92,213.40
  6. Step 6: Final answer
    x = 85,912.52

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