Finding the Fourth Proportional to 112,909.20, 155,835 and 65,155.92

Step by Step Solution

1. Step 1: Write the proportion equation
   112,909.20 : 155,835 = 65,155.92 : x
2. Step 2: Convert to fraction form
   112,909.20/155,835 = 65,155.92/x
3. Step 3: Cross multiply
   112,909.20x = 155,835 × 65,155.92
4. Step 4: Simplify right side
   112,909.20x = 10,153,572,793.20
5. Step 5: Solve for x
   x = 10,153,572,793.20/112,909.20
6. Step 6: Final answer
   x = 89,926.89