Finding the Fourth Proportional to 9,114.72, 12,576.72 and 5,135.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,114.72 : 12,576.72 = 5,135.52 : x
2. Step 2: Convert to fraction form
   9,114.72/12,576.72 = 5,135.52/x
3. Step 3: Cross multiply
   9,114.72x = 12,576.72 × 5,135.52
4. Step 4: Simplify right side
   9,114.72x = 64,587,997.09
5. Step 5: Solve for x
   x = 64,587,997.09/9,114.72
6. Step 6: Final answer
   x = 7,086.12