Finding the Fourth Proportional to 123,899.49, 170,994.98 and 69,456.89

Step by Step Solution

1. Step 1: Write the proportion equation
   123,899.49 : 170,994.98 = 69,456.89 : x
2. Step 2: Convert to fraction form
   123,899.49/170,994.98 = 69,456.89/x
3. Step 3: Cross multiply
   123,899.49x = 170,994.98 × 69,456.89
4. Step 4: Simplify right side
   123,899.49x = 11,876,780,117.54
5. Step 5: Solve for x
   x = 11,876,780,117.54/123,899.49
6. Step 6: Final answer
   x = 95,858.18