Finding the Fourth Proportional to 8,209.31, 12,314.22 and 2,662.70

Step by Step Solution

1. Step 1: Write the proportion equation
   8,209.31 : 12,314.22 = 2,662.70 : x
2. Step 2: Convert to fraction form
   8,209.31/12,314.22 = 2,662.70/x
3. Step 3: Cross multiply
   8,209.31x = 12,314.22 × 2,662.70
4. Step 4: Simplify right side
   8,209.31x = 32,789,012.02
5. Step 5: Solve for x
   x = 32,789,012.02/8,209.31
6. Step 6: Final answer
   x = 3,994.13