Finding the Fourth Proportional to 2,722.07, 4,082.88 and 872.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,722.07 : 4,082.88 = 872.68 : x
2. Step 2: Convert to fraction form
   2,722.07/4,082.88 = 872.68/x
3. Step 3: Cross multiply
   2,722.07x = 4,082.88 × 872.68
4. Step 4: Simplify right side
   2,722.07x = 3,563,047.72
5. Step 5: Solve for x
   x = 3,563,047.72/2,722.07
6. Step 6: Final answer
   x = 1,308.95