Finding the Fourth Proportional to 10,688.28, 16,105.38 and 8,783.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,688.28 : 16,105.38 = 8,783.16 : x
2. Step 2: Convert to fraction form
   10,688.28/16,105.38 = 8,783.16/x
3. Step 3: Cross multiply
   10,688.28x = 16,105.38 × 8,783.16
4. Step 4: Simplify right side
   10,688.28x = 141,456,129.40
5. Step 5: Solve for x
   x = 141,456,129.40/10,688.28
6. Step 6: Final answer
   x = 13,234.70