Finding the Fourth Proportional to 1,663.54, 2,480.22 and 1,620.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,663.54 : 2,480.22 = 1,620.25 : x
2. Step 2: Convert to fraction form
   1,663.54/2,480.22 = 1,620.25/x
3. Step 3: Cross multiply
   1,663.54x = 2,480.22 × 1,620.25
4. Step 4: Simplify right side
   1,663.54x = 4,018,584.21
5. Step 5: Solve for x
   x = 4,018,584.21/1,663.54
6. Step 6: Final answer
   x = 2,415.69