Finding the Fourth Proportional to 123,318.18, 185,042.07 and 67,198.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,318.18 : 185,042.07 = 67,198.50 : x
2. Step 2: Convert to fraction form
   123,318.18/185,042.07 = 67,198.50/x
3. Step 3: Cross multiply
   123,318.18x = 185,042.07 × 67,198.50
4. Step 4: Simplify right side
   123,318.18x = 12,434,549,540.90
5. Step 5: Solve for x
   x = 12,434,549,540.90/123,318.18
6. Step 6: Final answer
   x = 100,833.06