Finding the Fourth Proportional to 1,079.93, 1,621.52 and 618.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,079.93 : 1,621.52 = 618.23 : x
2. Step 2: Convert to fraction form
   1,079.93/1,621.52 = 618.23/x
3. Step 3: Cross multiply
   1,079.93x = 1,621.52 × 618.23
4. Step 4: Simplify right side
   1,079.93x = 1,002,475.59
5. Step 5: Solve for x
   x = 1,002,475.59/1,079.93
6. Step 6: Final answer
   x = 928.28