Finding the Fourth Proportional to 12,387.32, 17,089.60 and 7,078.04

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.32 : 17,089.60 = 7,078.04 : x
2. Step 2: Convert to fraction form
   12,387.32/17,089.60 = 7,078.04/x
3. Step 3: Cross multiply
   12,387.32x = 17,089.60 × 7,078.04
4. Step 4: Simplify right side
   12,387.32x = 120,960,872.38
5. Step 5: Solve for x
   x = 120,960,872.38/12,387.32
6. Step 6: Final answer
   x = 9,764.89