Finding the Fourth Proportional to 120,403.77, 166,155.37 and 65,955.50

Step by Step Solution

1. Step 1: Write the proportion equation
   120,403.77 : 166,155.37 = 65,955.50 : x
2. Step 2: Convert to fraction form
   120,403.77/166,155.37 = 65,955.50/x
3. Step 3: Cross multiply
   120,403.77x = 166,155.37 × 65,955.50
4. Step 4: Simplify right side
   120,403.77x = 10,958,860,133.45
5. Step 5: Solve for x
   x = 10,958,860,133.45/120,403.77
6. Step 6: Final answer
   x = 91,017.59