Finding the Fourth Proportional to 1,662.38, 2,290.74 and 1,396.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.38 : 2,290.74 = 1,396.36 : x
2. Step 2: Convert to fraction form
   1,662.38/2,290.74 = 1,396.36/x
3. Step 3: Cross multiply
   1,662.38x = 2,290.74 × 1,396.36
4. Step 4: Simplify right side
   1,662.38x = 3,198,697.71
5. Step 5: Solve for x
   x = 3,198,697.71/1,662.38
6. Step 6: Final answer
   x = 1,924.17