Finding the Fourth Proportional to 10,499.58, 15,750.18 and 7,760.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.58 : 15,750.18 = 7,760.16 : x
2. Step 2: Convert to fraction form
   10,499.58/15,750.18 = 7,760.16/x
3. Step 3: Cross multiply
   10,499.58x = 15,750.18 × 7,760.16
4. Step 4: Simplify right side
   10,499.58x = 122,223,916.83
5. Step 5: Solve for x
   x = 122,223,916.83/10,499.58
6. Step 6: Final answer
   x = 11,640.84