Finding the Fourth Proportional to 2,906.40, 4,006.72 and 2,066.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,906.40 : 4,006.72 = 2,066.79 : x
2. Step 2: Convert to fraction form
   2,906.40/4,006.72 = 2,066.79/x
3. Step 3: Cross multiply
   2,906.40x = 4,006.72 × 2,066.79
4. Step 4: Simplify right side
   2,906.40x = 8,281,048.83
5. Step 5: Solve for x
   x = 8,281,048.83/2,906.40
6. Step 6: Final answer
   x = 2,849.25