Finding the Fourth Proportional to 2,068.10, 2,851.32 and 1,280.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.10 : 2,851.32 = 1,280.78 : x
2. Step 2: Convert to fraction form
   2,068.10/2,851.32 = 1,280.78/x
3. Step 3: Cross multiply
   2,068.10x = 2,851.32 × 1,280.78
4. Step 4: Simplify right side
   2,068.10x = 3,651,913.63
5. Step 5: Solve for x
   x = 3,651,913.63/2,068.10
6. Step 6: Final answer
   x = 1,765.83