Finding the Fourth Proportional to 90,859.73, 136,895.27 and 83,686.37

Step by Step Solution

1. Step 1: Write the proportion equation
   90,859.73 : 136,895.27 = 83,686.37 : x
2. Step 2: Convert to fraction form
   90,859.73/136,895.27 = 83,686.37/x
3. Step 3: Cross multiply
   90,859.73x = 136,895.27 × 83,686.37
4. Step 4: Simplify right side
   90,859.73x = 11,456,267,113.56
5. Step 5: Solve for x
   x = 11,456,267,113.56/90,859.73
6. Step 6: Final answer
   x = 126,087.41