Finding the Fourth Proportional to 123,406.82, 170,283.04 and 69,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,406.82 : 170,283.04 = 69,690.78 : x
2. Step 2: Convert to fraction form
   123,406.82/170,283.04 = 69,690.78/x
3. Step 3: Cross multiply
   123,406.82x = 170,283.04 × 69,690.78
4. Step 4: Simplify right side
   123,406.82x = 11,867,157,878.37
5. Step 5: Solve for x
   x = 11,867,157,878.37/123,406.82
6. Step 6: Final answer
   x = 96,162.90