Finding the Fourth Proportional to 12,559.16, 17,337.04 and 8,312.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,559.16 : 17,337.04 = 8,312.20 : x
2. Step 2: Convert to fraction form
   12,559.16/17,337.04 = 8,312.20/x
3. Step 3: Cross multiply
   12,559.16x = 17,337.04 × 8,312.20
4. Step 4: Simplify right side
   12,559.16x = 144,108,943.89
5. Step 5: Solve for x
   x = 144,108,943.89/12,559.16
6. Step 6: Final answer
   x = 11,474.41