Finding the Fourth Proportional to 112,916.49, 155,780.25 and 65,160.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,916.49 : 155,780.25 = 65,160.60 : x
2. Step 2: Convert to fraction form
   112,916.49/155,780.25 = 65,160.60/x
3. Step 3: Cross multiply
   112,916.49x = 155,780.25 × 65,160.60
4. Step 4: Simplify right side
   112,916.49x = 10,150,734,558.15
5. Step 5: Solve for x
   x = 10,150,734,558.15/112,916.49
6. Step 6: Final answer
   x = 89,895.94