Finding the Fourth Proportional to 12,396.32, 17,091.60 and 8,858.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,396.32 : 17,091.60 = 8,858.24 : x
2. Step 2: Convert to fraction form
   12,396.32/17,091.60 = 8,858.24/x
3. Step 3: Cross multiply
   12,396.32x = 17,091.60 × 8,858.24
4. Step 4: Simplify right side
   12,396.32x = 151,401,494.78
5. Step 5: Solve for x
   x = 151,401,494.78/12,396.32
6. Step 6: Final answer
   x = 12,213.42