Finding the Fourth Proportional to 10,680.96, 16,004.16 and 8,734.08

Step by Step Solution

1. Step 1: Write the proportion equation
   10,680.96 : 16,004.16 = 8,734.08 : x
2. Step 2: Convert to fraction form
   10,680.96/16,004.16 = 8,734.08/x
3. Step 3: Cross multiply
   10,680.96x = 16,004.16 × 8,734.08
4. Step 4: Simplify right side
   10,680.96x = 139,781,613.77
5. Step 5: Solve for x
   x = 139,781,613.77/10,680.96
6. Step 6: Final answer
   x = 13,086.99