Finding the Fourth Proportional to 9,111.53, 12,573.65 and 5,132.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,111.53 : 12,573.65 = 5,132.55 : x
2. Step 2: Convert to fraction form
   9,111.53/12,573.65 = 5,132.55/x
3. Step 3: Cross multiply
   9,111.53x = 12,573.65 × 5,132.55
4. Step 4: Simplify right side
   9,111.53x = 64,534,861.64
5. Step 5: Solve for x
   x = 64,534,861.64/9,111.53
6. Step 6: Final answer
   x = 7,082.77