Finding the Fourth Proportional to 112,411.20, 168,568.20 and 56,229.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,411.20 : 168,568.20 = 56,229.60 : x
2. Step 2: Convert to fraction form
   112,411.20/168,568.20 = 56,229.60/x
3. Step 3: Cross multiply
   112,411.20x = 168,568.20 × 56,229.60
4. Step 4: Simplify right side
   112,411.20x = 9,478,522,458.72
5. Step 5: Solve for x
   x = 9,478,522,458.72/112,411.20
6. Step 6: Final answer
   x = 84,320.09