Finding the Fourth Proportional to 2,621.40, 3,616.80 and 1,626.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.40 : 3,616.80 = 1,626.72 : x
2. Step 2: Convert to fraction form
   2,621.40/3,616.80 = 1,626.72/x
3. Step 3: Cross multiply
   2,621.40x = 3,616.80 × 1,626.72
4. Step 4: Simplify right side
   2,621.40x = 5,883,520.90
5. Step 5: Solve for x
   x = 5,883,520.90/2,621.40
6. Step 6: Final answer
   x = 2,244.42