Finding the Fourth Proportional to 11,561.52, 15,962.60 and 7,790.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,561.52 : 15,962.60 = 7,790.28 : x
2. Step 2: Convert to fraction form
   11,561.52/15,962.60 = 7,790.28/x
3. Step 3: Cross multiply
   11,561.52x = 15,962.60 × 7,790.28
4. Step 4: Simplify right side
   11,561.52x = 124,353,123.53
5. Step 5: Solve for x
   x = 124,353,123.53/11,561.52
6. Step 6: Final answer
   x = 10,755.78