Finding the Fourth Proportional to 1,776.43, 2,451.71 and 1,280.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.43 : 2,451.71 = 1,280.71 : x
2. Step 2: Convert to fraction form
   1,776.43/2,451.71 = 1,280.71/x
3. Step 3: Cross multiply
   1,776.43x = 2,451.71 × 1,280.71
4. Step 4: Simplify right side
   1,776.43x = 3,139,929.51
5. Step 5: Solve for x
   x = 3,139,929.51/1,776.43
6. Step 6: Final answer
   x = 1,767.55