Finding the Fourth Proportional to 120,213.99, 165,895.29 and 65,766.60

Step by Step Solution

1. Step 1: Write the proportion equation
   120,213.99 : 165,895.29 = 65,766.60 : x
2. Step 2: Convert to fraction form
   120,213.99/165,895.29 = 65,766.60/x
3. Step 3: Cross multiply
   120,213.99x = 165,895.29 × 65,766.60
4. Step 4: Simplify right side
   120,213.99x = 10,910,369,179.31
5. Step 5: Solve for x
   x = 10,910,369,179.31/120,213.99
6. Step 6: Final answer
   x = 90,757.90