Finding the Fourth Proportional to 9,311.31, 12,847.77 and 5,223.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,311.31 : 12,847.77 = 5,223.25 : x
2. Step 2: Convert to fraction form
   9,311.31/12,847.77 = 5,223.25/x
3. Step 3: Cross multiply
   9,311.31x = 12,847.77 × 5,223.25
4. Step 4: Simplify right side
   9,311.31x = 67,107,024.30
5. Step 5: Solve for x
   x = 67,107,024.30/9,311.31
6. Step 6: Final answer
   x = 7,207.04