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Finding the Fourth Proportional to 406,931.68, 610,272.72 and 281,378.68

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Solution

The fourth proportional to 406,931.68, 610,272.72 and 281,378.68 is: 421,981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,931.68 : 610,272.72 = 281,378.68 : x
  2. Step 2: Convert to fraction form
    406,931.68/610,272.72 = 281,378.68/x
  3. Step 3: Cross multiply
    406,931.68x = 610,272.72 × 281,378.68
  4. Step 4: Simplify right side
    406,931.68x = 171,717,732,393.61
  5. Step 5: Solve for x
    x = 171,717,732,393.61/406,931.68
  6. Step 6: Final answer
    x = 421,981.73

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