Finding the Fourth Proportional to 112,862.88, 155,725.56 and 65,113.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,862.88 : 155,725.56 = 65,113.20 : x
2. Step 2: Convert to fraction form
   112,862.88/155,725.56 = 65,113.20/x
3. Step 3: Cross multiply
   112,862.88x = 155,725.56 × 65,113.20
4. Step 4: Simplify right side
   112,862.88x = 10,139,789,533.39
5. Step 5: Solve for x
   x = 10,139,789,533.39/112,862.88
6. Step 6: Final answer
   x = 89,841.67