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Finding the Fourth Proportional to 92,806.22, 128,006.39 and 85,174.09

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Solution

The fourth proportional to 92,806.22, 128,006.39 and 85,174.09 is: 117,479.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,806.22 : 128,006.39 = 85,174.09 : x
  2. Step 2: Convert to fraction form
    92,806.22/128,006.39 = 85,174.09/x
  3. Step 3: Cross multiply
    92,806.22x = 128,006.39 × 85,174.09
  4. Step 4: Simplify right side
    92,806.22x = 10,902,827,675.35
  5. Step 5: Solve for x
    x = 10,902,827,675.35/92,806.22
  6. Step 6: Final answer
    x = 117,479.49

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