Finding the Fourth Proportional to 1,776.18, 2,451.36 and 1,280.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.18 : 2,451.36 = 1,280.46 : x
2. Step 2: Convert to fraction form
   1,776.18/2,451.36 = 1,280.46/x
3. Step 3: Cross multiply
   1,776.18x = 2,451.36 × 1,280.46
4. Step 4: Simplify right side
   1,776.18x = 3,138,868.43
5. Step 5: Solve for x
   x = 3,138,868.43/1,776.18
6. Step 6: Final answer
   x = 1,767.20