Finding the Fourth Proportional to 1,664.54, 2,481.71 and 1,621.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,664.54 : 2,481.71 = 1,621.25 : x
2. Step 2: Convert to fraction form
   1,664.54/2,481.71 = 1,621.25/x
3. Step 3: Cross multiply
   1,664.54x = 2,481.71 × 1,621.25
4. Step 4: Simplify right side
   1,664.54x = 4,023,472.34
5. Step 5: Solve for x
   x = 4,023,472.34/1,664.54
6. Step 6: Final answer
   x = 2,417.17