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Finding the Fourth Proportional to 10,956.60, 16,425.90 and 4,721.40

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Solution

The fourth proportional to 10,956.60, 16,425.90 and 4,721.40 is: 7,078.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,956.60 : 16,425.90 = 4,721.40 : x
  2. Step 2: Convert to fraction form
    10,956.60/16,425.90 = 4,721.40/x
  3. Step 3: Cross multiply
    10,956.60x = 16,425.90 × 4,721.40
  4. Step 4: Simplify right side
    10,956.60x = 77,553,244.26
  5. Step 5: Solve for x
    x = 77,553,244.26/10,956.60
  6. Step 6: Final answer
    x = 7,078.22

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