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Finding the Fourth Proportional to 75,890.40, 113,848.80 and 31,492.80

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Solution

The fourth proportional to 75,890.40, 113,848.80 and 31,492.80 is: 47,244.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,890.40 : 113,848.80 = 31,492.80 : x
  2. Step 2: Convert to fraction form
    75,890.40/113,848.80 = 31,492.80/x
  3. Step 3: Cross multiply
    75,890.40x = 113,848.80 × 31,492.80
  4. Step 4: Simplify right side
    75,890.40x = 3,585,417,488.64
  5. Step 5: Solve for x
    x = 3,585,417,488.64/75,890.40
  6. Step 6: Final answer
    x = 47,244.68

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