Finding the Fourth Proportional to 2,722.90, 4,084.89 and 873.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.90 : 4,084.89 = 873.88 : x
2. Step 2: Convert to fraction form
   2,722.90/4,084.89 = 873.88/x
3. Step 3: Cross multiply
   2,722.90x = 4,084.89 × 873.88
4. Step 4: Simplify right side
   2,722.90x = 3,569,686.17
5. Step 5: Solve for x
   x = 3,569,686.17/2,722.90
6. Step 6: Final answer
   x = 1,310.99