Finding the Fourth Proportional to 2,620.31, 3,616.25 and 1,441.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620.31 : 3,616.25 = 1,441.60 : x
2. Step 2: Convert to fraction form
   2,620.31/3,616.25 = 1,441.60/x
3. Step 3: Cross multiply
   2,620.31x = 3,616.25 × 1,441.60
4. Step 4: Simplify right side
   2,620.31x = 5,213,160.71
5. Step 5: Solve for x
   x = 5,213,160.71/2,620.31
6. Step 6: Final answer
   x = 1,989.52