Finding the Fourth Proportional to 1,443.10, 2,160.60 and 1,297.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.10 : 2,160.60 = 1,297.30 : x
2. Step 2: Convert to fraction form
   1,443.10/2,160.60 = 1,297.30/x
3. Step 3: Cross multiply
   1,443.10x = 2,160.60 × 1,297.30
4. Step 4: Simplify right side
   1,443.10x = 2,802,946.38
5. Step 5: Solve for x
   x = 2,802,946.38/1,443.10
6. Step 6: Final answer
   x = 1,942.31