Finding the Fourth Proportional to 112,903.20, 155,826.72 and 65,149.92

Step by Step Solution

1. Step 1: Write the proportion equation
   112,903.20 : 155,826.72 = 65,149.92 : x
2. Step 2: Convert to fraction form
   112,903.20/155,826.72 = 65,149.92/x
3. Step 3: Cross multiply
   112,903.20x = 155,826.72 × 65,149.92
4. Step 4: Simplify right side
   112,903.20x = 10,152,098,341.86
5. Step 5: Solve for x
   x = 10,152,098,341.86/112,903.20
6. Step 6: Final answer
   x = 89,918.61