Finding the Fourth Proportional to 2,454.68, 3,674.78 and 1,620.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,454.68 : 3,674.78 = 1,620.20 : x
2. Step 2: Convert to fraction form
   2,454.68/3,674.78 = 1,620.20/x
3. Step 3: Cross multiply
   2,454.68x = 3,674.78 × 1,620.20
4. Step 4: Simplify right side
   2,454.68x = 5,953,871.94
5. Step 5: Solve for x
   x = 5,953,871.94/2,454.68
6. Step 6: Final answer
   x = 2,425.52