Finding the Fourth Proportional to 11,761.18, 17,647.16 and 5,099.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,761.18 : 17,647.16 = 5,099.72 : x
2. Step 2: Convert to fraction form
   11,761.18/17,647.16 = 5,099.72/x
3. Step 3: Cross multiply
   11,761.18x = 17,647.16 × 5,099.72
4. Step 4: Simplify right side
   11,761.18x = 89,995,574.80
5. Step 5: Solve for x
   x = 89,995,574.80/11,761.18
6. Step 6: Final answer
   x = 7,651.92