Finding the Fourth Proportional to 9,178.52, 12,660.72 and 8,002.40

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.52 : 12,660.72 = 8,002.40 : x
2. Step 2: Convert to fraction form
   9,178.52/12,660.72 = 8,002.40/x
3. Step 3: Cross multiply
   9,178.52x = 12,660.72 × 8,002.40
4. Step 4: Simplify right side
   9,178.52x = 101,316,145.73
5. Step 5: Solve for x
   x = 101,316,145.73/9,178.52
6. Step 6: Final answer
   x = 11,038.40