Finding the Fourth Proportional to 11,688.56, 16,114.90 and 8,654.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,688.56 : 16,114.90 = 8,654.09 : x
2. Step 2: Convert to fraction form
   11,688.56/16,114.90 = 8,654.09/x
3. Step 3: Cross multiply
   11,688.56x = 16,114.90 × 8,654.09
4. Step 4: Simplify right side
   11,688.56x = 139,459,751.67
5. Step 5: Solve for x
   x = 139,459,751.67/11,688.56
6. Step 6: Final answer
   x = 11,931.31