Finding the Fourth Proportional to 11,640.40, 16,058.54 and 7,760.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,640.40 : 16,058.54 = 7,760.72 : x
2. Step 2: Convert to fraction form
   11,640.40/16,058.54 = 7,760.72/x
3. Step 3: Cross multiply
   11,640.40x = 16,058.54 × 7,760.72
4. Step 4: Simplify right side
   11,640.40x = 124,625,832.55
5. Step 5: Solve for x
   x = 124,625,832.55/11,640.40
6. Step 6: Final answer
   x = 10,706.32