Finding the Fourth Proportional to 120,565.61, 166,387.89 and 66,850.61

Step by Step Solution

1. Step 1: Write the proportion equation
   120,565.61 : 166,387.89 = 66,850.61 : x
2. Step 2: Convert to fraction form
   120,565.61/166,387.89 = 66,850.61/x
3. Step 3: Cross multiply
   120,565.61x = 166,387.89 × 66,850.61
4. Step 4: Simplify right side
   120,565.61x = 11,123,131,111.17
5. Step 5: Solve for x
   x = 11,123,131,111.17/120,565.61
6. Step 6: Final answer
   x = 92,257.91