Finding the Fourth Proportional to 12,168.72, 16,792.56 and 6,863.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,168.72 : 16,792.56 = 6,863.40 : x
2. Step 2: Convert to fraction form
   12,168.72/16,792.56 = 6,863.40/x
3. Step 3: Cross multiply
   12,168.72x = 16,792.56 × 6,863.40
4. Step 4: Simplify right side
   12,168.72x = 115,254,056.30
5. Step 5: Solve for x
   x = 115,254,056.30/12,168.72
6. Step 6: Final answer
   x = 9,471.34