Finding the Fourth Proportional to 12,475.50, 17,211.03 and 8,231.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,475.50 : 17,211.03 = 8,231.31 : x
2. Step 2: Convert to fraction form
   12,475.50/17,211.03 = 8,231.31/x
3. Step 3: Cross multiply
   12,475.50x = 17,211.03 × 8,231.31
4. Step 4: Simplify right side
   12,475.50x = 141,669,323.35
5. Step 5: Solve for x
   x = 141,669,323.35/12,475.50
6. Step 6: Final answer
   x = 11,355.80