Finding the Fourth Proportional to 2,715.90, 4,067.34 and 1,396.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,715.90 : 4,067.34 = 1,396.18 : x
2. Step 2: Convert to fraction form
   2,715.90/4,067.34 = 1,396.18/x
3. Step 3: Cross multiply
   2,715.90x = 4,067.34 × 1,396.18
4. Step 4: Simplify right side
   2,715.90x = 5,678,738.76
5. Step 5: Solve for x
   x = 5,678,738.76/2,715.90
6. Step 6: Final answer
   x = 2,090.92