Finding the Fourth Proportional to 12,396.56, 17,078.71 and 8,564.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,396.56 : 17,078.71 = 8,564.53 : x
2. Step 2: Convert to fraction form
   12,396.56/17,078.71 = 8,564.53/x
3. Step 3: Cross multiply
   12,396.56x = 17,078.71 × 8,564.53
4. Step 4: Simplify right side
   12,396.56x = 146,271,060.05
5. Step 5: Solve for x
   x = 146,271,060.05/12,396.56
6. Step 6: Final answer
   x = 11,799.32