Finding the Fourth Proportional to 10,507.11, 14,520.72 and 8,615.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,507.11 : 14,520.72 = 8,615.76 : x
2. Step 2: Convert to fraction form
   10,507.11/14,520.72 = 8,615.76/x
3. Step 3: Cross multiply
   10,507.11x = 14,520.72 × 8,615.76
4. Step 4: Simplify right side
   10,507.11x = 125,107,038.55
5. Step 5: Solve for x
   x = 125,107,038.55/10,507.11
6. Step 6: Final answer
   x = 11,906.89