Finding the Fourth Proportional to 1,618.57, 2,425.55 and 738.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,618.57 : 2,425.55 = 738.91 : x
2. Step 2: Convert to fraction form
   1,618.57/2,425.55 = 738.91/x
3. Step 3: Cross multiply
   1,618.57x = 2,425.55 × 738.91
4. Step 4: Simplify right side
   1,618.57x = 1,792,263.15
5. Step 5: Solve for x
   x = 1,792,263.15/1,618.57
6. Step 6: Final answer
   x = 1,107.31