Finding the Fourth Proportional to 8,087.88, 12,105.90 and 6,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,087.88 : 12,105.90 = 6,915.72 : x
2. Step 2: Convert to fraction form
   8,087.88/12,105.90 = 6,915.72/x
3. Step 3: Cross multiply
   8,087.88x = 12,105.90 × 6,915.72
4. Step 4: Simplify right side
   8,087.88x = 83,721,014.75
5. Step 5: Solve for x
   x = 83,721,014.75/8,087.88
6. Step 6: Final answer
   x = 10,351.42