Finding the Fourth Proportional to 12,315.78, 18,469.80 and 8,098.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,315.78 : 18,469.80 = 8,098.82 : x
2. Step 2: Convert to fraction form
   12,315.78/18,469.80 = 8,098.82/x
3. Step 3: Cross multiply
   12,315.78x = 18,469.80 × 8,098.82
4. Step 4: Simplify right side
   12,315.78x = 149,583,585.64
5. Step 5: Solve for x
   x = 149,583,585.64/12,315.78
6. Step 6: Final answer
   x = 12,145.69