Finding the Fourth Proportional to 11,087.72, 15,297.39 and 7,312.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,087.72 : 15,297.39 = 7,312.76 : x
2. Step 2: Convert to fraction form
   11,087.72/15,297.39 = 7,312.76/x
3. Step 3: Cross multiply
   11,087.72x = 15,297.39 × 7,312.76
4. Step 4: Simplify right side
   11,087.72x = 111,866,141.70
5. Step 5: Solve for x
   x = 111,866,141.70/11,087.72
6. Step 6: Final answer
   x = 10,089.19