Finding the Fourth Proportional to 11,655.42, 17,485.89 and 5,082.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,655.42 : 17,485.89 = 5,082.78 : x
2. Step 2: Convert to fraction form
   11,655.42/17,485.89 = 5,082.78/x
3. Step 3: Cross multiply
   11,655.42x = 17,485.89 × 5,082.78
4. Step 4: Simplify right side
   11,655.42x = 88,876,931.97
5. Step 5: Solve for x
   x = 88,876,931.97/11,655.42
6. Step 6: Final answer
   x = 7,625.37