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Finding the Fourth Proportional to 1,291,974, 1,937,978.28 and 405,510

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Solution

The fourth proportional to 1,291,974, 1,937,978.28 and 405,510 is: 608,270.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,974 : 1,937,978.28 = 405,510 : x
  2. Step 2: Convert to fraction form
    1,291,974/1,937,978.28 = 405,510/x
  3. Step 3: Cross multiply
    1,291,974x = 1,937,978.28 × 405,510
  4. Step 4: Simplify right side
    1,291,974x = 785,869,572,322.80
  5. Step 5: Solve for x
    x = 785,869,572,322.80/1,291,974
  6. Step 6: Final answer
    x = 608,270.42

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