Finding the Fourth Proportional to 123,638.72, 170,620.29 and 69,934.23

Step by Step Solution

1. Step 1: Write the proportion equation
   123,638.72 : 170,620.29 = 69,934.23 : x
2. Step 2: Convert to fraction form
   123,638.72/170,620.29 = 69,934.23/x
3. Step 3: Cross multiply
   123,638.72x = 170,620.29 × 69,934.23
4. Step 4: Simplify right side
   123,638.72x = 11,932,198,603.53
5. Step 5: Solve for x
   x = 11,932,198,603.53/123,638.72
6. Step 6: Final answer
   x = 96,508.59