Finding the Fourth Proportional to 123,879.38, 170,953.52 and 67,290.72

Step by Step Solution

1. Step 1: Write the proportion equation
   123,879.38 : 170,953.52 = 67,290.72 : x
2. Step 2: Convert to fraction form
   123,879.38/170,953.52 = 67,290.72/x
3. Step 3: Cross multiply
   123,879.38x = 170,953.52 × 67,290.72
4. Step 4: Simplify right side
   123,879.38x = 11,503,585,447.33
5. Step 5: Solve for x
   x = 11,503,585,447.33/123,879.38
6. Step 6: Final answer
   x = 92,861.18