Finding the Fourth Proportional to 103,678.10, 155,517.15 and 82,942.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103,678.10 : 155,517.15 = 82,942.10 : x
2. Step 2: Convert to fraction form
   103,678.10/155,517.15 = 82,942.10/x
3. Step 3: Cross multiply
   103,678.10x = 155,517.15 × 82,942.10
4. Step 4: Simplify right side
   103,678.10x = 12,898,919,007.02
5. Step 5: Solve for x
   x = 12,898,919,007.02/103,678.10
6. Step 6: Final answer
   x = 124,413.15