Finding the Fourth Proportional to 2,782.89, 4,172.31 and 1,396.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,782.89 : 4,172.31 = 1,396.17 : x
2. Step 2: Convert to fraction form
   2,782.89/4,172.31 = 1,396.17/x
3. Step 3: Cross multiply
   2,782.89x = 4,172.31 × 1,396.17
4. Step 4: Simplify right side
   2,782.89x = 5,825,254.05
5. Step 5: Solve for x
   x = 5,825,254.05/2,782.89
6. Step 6: Final answer
   x = 2,093.24