Finding the Fourth Proportional to 2,705.62, 4,055.43 and 1,243.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.62 : 4,055.43 = 1,243.30 : x
2. Step 2: Convert to fraction form
   2,705.62/4,055.43 = 1,243.30/x
3. Step 3: Cross multiply
   2,705.62x = 4,055.43 × 1,243.30
4. Step 4: Simplify right side
   2,705.62x = 5,042,116.12
5. Step 5: Solve for x
   x = 5,042,116.12/2,705.62
6. Step 6: Final answer
   x = 1,863.57