Finding the Fourth Proportional to 2,066.40, 2,850.62 and 1,280.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,066.40 : 2,850.62 = 1,280.34 : x
2. Step 2: Convert to fraction form
   2,066.40/2,850.62 = 1,280.34/x
3. Step 3: Cross multiply
   2,066.40x = 2,850.62 × 1,280.34
4. Step 4: Simplify right side
   2,066.40x = 3,649,756.41
5. Step 5: Solve for x
   x = 3,649,756.41/2,066.40
6. Step 6: Final answer
   x = 1,766.24