Finding the Fourth Proportional to 1,639.02, 2,448.95 and 1,581.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,639.02 : 2,448.95 = 1,581.62 : x
2. Step 2: Convert to fraction form
   1,639.02/2,448.95 = 1,581.62/x
3. Step 3: Cross multiply
   1,639.02x = 2,448.95 × 1,581.62
4. Step 4: Simplify right side
   1,639.02x = 3,873,288.15
5. Step 5: Solve for x
   x = 3,873,288.15/1,639.02
6. Step 6: Final answer
   x = 2,363.17