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Finding the Fourth Proportional to 612,091.20, 918,136.80 and 191,409.60

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Solution

The fourth proportional to 612,091.20, 918,136.80 and 191,409.60 is: 287,114.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,091.20 : 918,136.80 = 191,409.60 : x
  2. Step 2: Convert to fraction form
    612,091.20/918,136.80 = 191,409.60/x
  3. Step 3: Cross multiply
    612,091.20x = 918,136.80 × 191,409.60
  4. Step 4: Simplify right side
    612,091.20x = 175,740,197,633.28
  5. Step 5: Solve for x
    x = 175,740,197,633.28/612,091.20
  6. Step 6: Final answer
    x = 287,114.40

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