Finding the Fourth Proportional to 11,087.89, 15,275.30 and 7,724.62

Step by Step Solution

1. Step 1: Write the proportion equation
   11,087.89 : 15,275.30 = 7,724.62 : x
2. Step 2: Convert to fraction form
   11,087.89/15,275.30 = 7,724.62/x
3. Step 3: Cross multiply
   11,087.89x = 15,275.30 × 7,724.62
4. Step 4: Simplify right side
   11,087.89x = 117,995,911.81
5. Step 5: Solve for x
   x = 117,995,911.81/11,087.89
6. Step 6: Final answer
   x = 10,641.87