Finding the Fourth Proportional to 2,078.80, 2,870.58 and 1,294.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.80 : 2,870.58 = 1,294.18 : x
2. Step 2: Convert to fraction form
   2,078.80/2,870.58 = 1,294.18/x
3. Step 3: Cross multiply
   2,078.80x = 2,870.58 × 1,294.18
4. Step 4: Simplify right side
   2,078.80x = 3,715,047.22
5. Step 5: Solve for x
   x = 3,715,047.22/2,078.80
6. Step 6: Final answer
   x = 1,787.11