Finding the Fourth Proportional to 1,843.98, 2,766.78 and 870.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,843.98 : 2,766.78 = 870.78 : x
2. Step 2: Convert to fraction form
   1,843.98/2,766.78 = 870.78/x
3. Step 3: Cross multiply
   1,843.98x = 2,766.78 × 870.78
4. Step 4: Simplify right side
   1,843.98x = 2,409,256.69
5. Step 5: Solve for x
   x = 2,409,256.69/1,843.98
6. Step 6: Final answer
   x = 1,306.55