Finding the Fourth Proportional to 12,395.20, 17,100.67 and 8,148.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,395.20 : 17,100.67 = 8,148.55 : x
2. Step 2: Convert to fraction form
   12,395.20/17,100.67 = 8,148.55/x
3. Step 3: Cross multiply
   12,395.20x = 17,100.67 × 8,148.55
4. Step 4: Simplify right side
   12,395.20x = 139,345,664.53
5. Step 5: Solve for x
   x = 139,345,664.53/12,395.20
6. Step 6: Final answer
   x = 11,241.91