Finding the Fourth Proportional to 8,280.78, 12,361.50 and 7,098

Step by Step Solution

1. Step 1: Write the proportion equation
   8,280.78 : 12,361.50 = 7,098 : x
2. Step 2: Convert to fraction form
   8,280.78/12,361.50 = 7,098/x
3. Step 3: Cross multiply
   8,280.78x = 12,361.50 × 7,098
4. Step 4: Simplify right side
   8,280.78x = 87,741,927
5. Step 5: Solve for x
   x = 87,741,927/8,280.78
6. Step 6: Final answer
   x = 10,595.85