Finding the Fourth Proportional to 120,335.83, 166,057.12 and 65,877.57

Step by Step Solution

1. Step 1: Write the proportion equation
   120,335.83 : 166,057.12 = 65,877.57 : x
2. Step 2: Convert to fraction form
   120,335.83/166,057.12 = 65,877.57/x
3. Step 3: Cross multiply
   120,335.83x = 166,057.12 × 65,877.57
4. Step 4: Simplify right side
   120,335.83x = 10,939,439,546.80
5. Step 5: Solve for x
   x = 10,939,439,546.80/120,335.83
6. Step 6: Final answer
   x = 90,907.58