Finding the Fourth Proportional to 1,643.92, 2,463.72 and 1,229.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.92 : 2,463.72 = 1,229.74 : x
2. Step 2: Convert to fraction form
   1,643.92/2,463.72 = 1,229.74/x
3. Step 3: Cross multiply
   1,643.92x = 2,463.72 × 1,229.74
4. Step 4: Simplify right side
   1,643.92x = 3,029,735.03
5. Step 5: Solve for x
   x = 3,029,735.03/1,643.92
6. Step 6: Final answer
   x = 1,842.99