Finding the Fourth Proportional to 9,111.72, 12,573.12 and 5,132.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.72 : 12,573.12 = 5,132.76 : x
2. Step 2: Convert to fraction form
   9,111.72/12,573.12 = 5,132.76/x
3. Step 3: Cross multiply
   9,111.72x = 12,573.12 × 5,132.76
4. Step 4: Simplify right side
   9,111.72x = 64,534,807.41
5. Step 5: Solve for x
   x = 64,534,807.41/9,111.72
6. Step 6: Final answer
   x = 7,082.62