Finding the Fourth Proportional to 9,078.72, 12,540.96 and 7,114.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,078.72 : 12,540.96 = 7,114.08 : x
2. Step 2: Convert to fraction form
   9,078.72/12,540.96 = 7,114.08/x
3. Step 3: Cross multiply
   9,078.72x = 12,540.96 × 7,114.08
4. Step 4: Simplify right side
   9,078.72x = 89,217,392.72
5. Step 5: Solve for x
   x = 89,217,392.72/9,078.72
6. Step 6: Final answer
   x = 9,827.09