Finding the Fourth Proportional to 12,388.56, 17,100.12 and 8,361.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.56 : 17,100.12 = 8,361.24 : x
2. Step 2: Convert to fraction form
   12,388.56/17,100.12 = 8,361.24/x
3. Step 3: Cross multiply
   12,388.56x = 17,100.12 × 8,361.24
4. Step 4: Simplify right side
   12,388.56x = 142,978,207.35
5. Step 5: Solve for x
   x = 142,978,207.35/12,388.56
6. Step 6: Final answer
   x = 11,541.15