Finding the Fourth Proportional to 8,609.90, 12,914.38 and 2,766.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,609.90 : 12,914.38 = 2,766.05 : x
2. Step 2: Convert to fraction form
   8,609.90/12,914.38 = 2,766.05/x
3. Step 3: Cross multiply
   8,609.90x = 12,914.38 × 2,766.05
4. Step 4: Simplify right side
   8,609.90x = 35,721,749.31
5. Step 5: Solve for x
   x = 35,721,749.31/8,609.90
6. Step 6: Final answer
   x = 4,148.92