Finding the Fourth Proportional to 123,686.78, 170,688.06 and 67,098.15

Step by Step Solution

1. Step 1: Write the proportion equation
   123,686.78 : 170,688.06 = 67,098.15 : x
2. Step 2: Convert to fraction form
   123,686.78/170,688.06 = 67,098.15/x
3. Step 3: Cross multiply
   123,686.78x = 170,688.06 × 67,098.15
4. Step 4: Simplify right side
   123,686.78x = 11,452,853,053.09
5. Step 5: Solve for x
   x = 11,452,853,053.09/123,686.78
6. Step 6: Final answer
   x = 92,595.62