Finding the Fourth Proportional to 1,626.39, 2,440.80 and 1,078.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,626.39 : 2,440.80 = 1,078.38 : x
2. Step 2: Convert to fraction form
   1,626.39/2,440.80 = 1,078.38/x
3. Step 3: Cross multiply
   1,626.39x = 2,440.80 × 1,078.38
4. Step 4: Simplify right side
   1,626.39x = 2,632,109.90
5. Step 5: Solve for x
   x = 2,632,109.90/1,626.39
6. Step 6: Final answer
   x = 1,618.38