Finding the Fourth Proportional to 12,200.31, 16,850.27 and 8,214.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.31 : 16,850.27 = 8,214.50 : x
2. Step 2: Convert to fraction form
   12,200.31/16,850.27 = 8,214.50/x
3. Step 3: Cross multiply
   12,200.31x = 16,850.27 × 8,214.50
4. Step 4: Simplify right side
   12,200.31x = 138,416,524.12
5. Step 5: Solve for x
   x = 138,416,524.12/12,200.31
6. Step 6: Final answer
   x = 11,345.33