Finding the Fourth Proportional to 1,640.71, 2,459.01 and 1,443.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,640.71 : 2,459.01 = 1,443.88 : x
2. Step 2: Convert to fraction form
   1,640.71/2,459.01 = 1,443.88/x
3. Step 3: Cross multiply
   1,640.71x = 2,459.01 × 1,443.88
4. Step 4: Simplify right side
   1,640.71x = 3,550,501.89
5. Step 5: Solve for x
   x = 3,550,501.89/1,640.71
6. Step 6: Final answer
   x = 2,164.01