Finding the Fourth Proportional to 120,355.88, 166,093.71 and 65,910.35

Step by Step Solution

1. Step 1: Write the proportion equation
   120,355.88 : 166,093.71 = 65,910.35 : x
2. Step 2: Convert to fraction form
   120,355.88/166,093.71 = 65,910.35/x
3. Step 3: Cross multiply
   120,355.88x = 166,093.71 × 65,910.35
4. Step 4: Simplify right side
   120,355.88x = 10,947,293,728.43
5. Step 5: Solve for x
   x = 10,947,293,728.43/120,355.88
6. Step 6: Final answer
   x = 90,957.70