Finding the Fourth Proportional to 2,617.94, 3,612.63 and 1,623.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.94 : 3,612.63 = 1,623.20 : x
2. Step 2: Convert to fraction form
   2,617.94/3,612.63 = 1,623.20/x
3. Step 3: Cross multiply
   2,617.94x = 3,612.63 × 1,623.20
4. Step 4: Simplify right side
   2,617.94x = 5,864,002.95
5. Step 5: Solve for x
   x = 5,864,002.95/2,617.94
6. Step 6: Final answer
   x = 2,239.93