Finding the Fourth Proportional to 1,079.94, 1,621.52 and 618.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.94 : 1,621.52 = 618.24 : x
2. Step 2: Convert to fraction form
   1,079.94/1,621.52 = 618.24/x
3. Step 3: Cross multiply
   1,079.94x = 1,621.52 × 618.24
4. Step 4: Simplify right side
   1,079.94x = 1,002,488.52
5. Step 5: Solve for x
   x = 1,002,488.52/1,079.94
6. Step 6: Final answer
   x = 928.28