Finding the Fourth Proportional to 2,725.60, 4,089.33 and 876.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,725.60 : 4,089.33 = 876.78 : x
2. Step 2: Convert to fraction form
   2,725.60/4,089.33 = 876.78/x
3. Step 3: Cross multiply
   2,725.60x = 4,089.33 × 876.78
4. Step 4: Simplify right side
   2,725.60x = 3,585,422.31
5. Step 5: Solve for x
   x = 3,585,422.31/2,725.60
6. Step 6: Final answer
   x = 1,315.46