Finding the Fourth Proportional to 2,506.96, 3,456.78 and 1,621.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,506.96 : 3,456.78 = 1,621.60 : x
2. Step 2: Convert to fraction form
   2,506.96/3,456.78 = 1,621.60/x
3. Step 3: Cross multiply
   2,506.96x = 3,456.78 × 1,621.60
4. Step 4: Simplify right side
   2,506.96x = 5,605,514.45
5. Step 5: Solve for x
   x = 5,605,514.45/2,506.96
6. Step 6: Final answer
   x = 2,235.98