Finding the Fourth Proportional to 120,422.78, 166,176.32 and 65,964.12

Step by Step Solution

1. Step 1: Write the proportion equation
   120,422.78 : 166,176.32 = 65,964.12 : x
2. Step 2: Convert to fraction form
   120,422.78/166,176.32 = 65,964.12/x
3. Step 3: Cross multiply
   120,422.78x = 166,176.32 × 65,964.12
4. Step 4: Simplify right side
   120,422.78x = 10,961,674,713.64
5. Step 5: Solve for x
   x = 10,961,674,713.64/120,422.78
6. Step 6: Final answer
   x = 91,026.59