Finding the Fourth Proportional to 12,223.16, 16,881.72 and 8,260.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,223.16 : 16,881.72 = 8,260.64 : x
2. Step 2: Convert to fraction form
   12,223.16/16,881.72 = 8,260.64/x
3. Step 3: Cross multiply
   12,223.16x = 16,881.72 × 8,260.64
4. Step 4: Simplify right side
   12,223.16x = 139,453,811.50
5. Step 5: Solve for x
   x = 139,453,811.50/12,223.16
6. Step 6: Final answer
   x = 11,408.98