Finding the Fourth Proportional to 8,144.55, 12,211.56 and 5,225.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,144.55 : 12,211.56 = 5,225.31 : x
2. Step 2: Convert to fraction form
   8,144.55/12,211.56 = 5,225.31/x
3. Step 3: Cross multiply
   8,144.55x = 12,211.56 × 5,225.31
4. Step 4: Simplify right side
   8,144.55x = 63,809,186.58
5. Step 5: Solve for x
   x = 63,809,186.58/8,144.55
6. Step 6: Final answer
   x = 7,834.59