Finding the Fourth Proportional to 11,531.08, 15,919.50 and 7,759.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,531.08 : 15,919.50 = 7,759.72 : x
2. Step 2: Convert to fraction form
   11,531.08/15,919.50 = 7,759.72/x
3. Step 3: Cross multiply
   11,531.08x = 15,919.50 × 7,759.72
4. Step 4: Simplify right side
   11,531.08x = 123,530,862.54
5. Step 5: Solve for x
   x = 123,530,862.54/11,531.08
6. Step 6: Final answer
   x = 10,712.86