Finding the Fourth Proportional to 120,355.63, 166,093.37 and 65,910.09

Step by Step Solution

1. Step 1: Write the proportion equation
   120,355.63 : 166,093.37 = 65,910.09 : x
2. Step 2: Convert to fraction form
   120,355.63/166,093.37 = 65,910.09/x
3. Step 3: Cross multiply
   120,355.63x = 166,093.37 × 65,910.09
4. Step 4: Simplify right side
   120,355.63x = 10,947,228,965.10
5. Step 5: Solve for x
   x = 10,947,228,965.10/120,355.63
6. Step 6: Final answer
   x = 90,957.35