Finding the Fourth Proportional to 113,145.60, 156,123.59 and 65,389.74

Step by Step Solution

1. Step 1: Write the proportion equation
   113,145.60 : 156,123.59 = 65,389.74 : x
2. Step 2: Convert to fraction form
   113,145.60/156,123.59 = 65,389.74/x
3. Step 3: Cross multiply
   113,145.60x = 156,123.59 × 65,389.74
4. Step 4: Simplify right side
   113,145.60x = 10,208,880,957.97
5. Step 5: Solve for x
   x = 10,208,880,957.97/113,145.60
6. Step 6: Final answer
   x = 90,227.82