Finding the Fourth Proportional to 113,131.88, 156,112.86 and 65,388.32

Step by Step Solution

1. Step 1: Write the proportion equation
   113,131.88 : 156,112.86 = 65,388.32 : x
2. Step 2: Convert to fraction form
   113,131.88/156,112.86 = 65,388.32/x
3. Step 3: Cross multiply
   113,131.88x = 156,112.86 × 65,388.32
4. Step 4: Simplify right side
   113,131.88x = 10,207,957,645.80
5. Step 5: Solve for x
   x = 10,207,957,645.80/113,131.88
6. Step 6: Final answer
   x = 90,230.60