Finding the Fourth Proportional to 11,314.50, 16,977.69 and 8,220.09

Step by Step Solution

1. Step 1: Write the proportion equation
   11,314.50 : 16,977.69 = 8,220.09 : x
2. Step 2: Convert to fraction form
   11,314.50/16,977.69 = 8,220.09/x
3. Step 3: Cross multiply
   11,314.50x = 16,977.69 × 8,220.09
4. Step 4: Simplify right side
   11,314.50x = 139,558,139.79
5. Step 5: Solve for x
   x = 139,558,139.79/11,314.50
6. Step 6: Final answer
   x = 12,334.45