Finding the Fourth Proportional to 120,650.27, 166,505.25 and 69,665.15

Step by Step Solution

1. Step 1: Write the proportion equation
   120,650.27 : 166,505.25 = 69,665.15 : x
2. Step 2: Convert to fraction form
   120,650.27/166,505.25 = 69,665.15/x
3. Step 3: Cross multiply
   120,650.27x = 166,505.25 × 69,665.15
4. Step 4: Simplify right side
   120,650.27x = 11,599,612,645.76
5. Step 5: Solve for x
   x = 11,599,612,645.76/120,650.27
6. Step 6: Final answer
   x = 96,142.45