Finding the Fourth Proportional to 10,688.03, 16,105 and 8,782.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.03 : 16,105 = 8,782.91 : x
2. Step 2: Convert to fraction form
   10,688.03/16,105 = 8,782.91/x
3. Step 3: Cross multiply
   10,688.03x = 16,105 × 8,782.91
4. Step 4: Simplify right side
   10,688.03x = 141,448,765.55
5. Step 5: Solve for x
   x = 141,448,765.55/10,688.03
6. Step 6: Final answer
   x = 13,234.32