Finding the Fourth Proportional to 1,616.54, 2,422.78 and 738.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.54 : 2,422.78 = 738.78 : x
2. Step 2: Convert to fraction form
   1,616.54/2,422.78 = 738.78/x
3. Step 3: Cross multiply
   1,616.54x = 2,422.78 × 738.78
4. Step 4: Simplify right side
   1,616.54x = 1,789,901.41
5. Step 5: Solve for x
   x = 1,789,901.41/1,616.54
6. Step 6: Final answer
   x = 1,107.24