Finding the Fourth Proportional to 120,406.64, 166,159.33 and 65,958.37

Step by Step Solution

1. Step 1: Write the proportion equation
   120,406.64 : 166,159.33 = 65,958.37 : x
2. Step 2: Convert to fraction form
   120,406.64/166,159.33 = 65,958.37/x
3. Step 3: Cross multiply
   120,406.64x = 166,159.33 × 65,958.37
4. Step 4: Simplify right side
   120,406.64x = 10,959,598,567.09
5. Step 5: Solve for x
   x = 10,959,598,567.09/120,406.64
6. Step 6: Final answer
   x = 91,021.55