Finding the Fourth Proportional to 12,360.28, 17,057.92 and 7,056.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,360.28 : 17,057.92 = 7,056.80 : x
2. Step 2: Convert to fraction form
   12,360.28/17,057.92 = 7,056.80/x
3. Step 3: Cross multiply
   12,360.28x = 17,057.92 × 7,056.80
4. Step 4: Simplify right side
   12,360.28x = 120,374,329.86
5. Step 5: Solve for x
   x = 120,374,329.86/12,360.28
6. Step 6: Final answer
   x = 9,738.80