Finding the Fourth Proportional to 113,146.86, 156,125.31 and 65,390.99

Step by Step Solution

1. Step 1: Write the proportion equation
   113,146.86 : 156,125.31 = 65,390.99 : x
2. Step 2: Convert to fraction form
   113,146.86/156,125.31 = 65,390.99/x
3. Step 3: Cross multiply
   113,146.86x = 156,125.31 × 65,390.99
4. Step 4: Simplify right side
   113,146.86x = 10,209,187,804.33
5. Step 5: Solve for x
   x = 10,209,187,804.33/113,146.86
6. Step 6: Final answer
   x = 90,229.53