Finding the Fourth Proportional to 1,443.96, 2,148.66 and 1,439.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.96 : 2,148.66 = 1,439.10 : x
2. Step 2: Convert to fraction form
   1,443.96/2,148.66 = 1,439.10/x
3. Step 3: Cross multiply
   1,443.96x = 2,148.66 × 1,439.10
4. Step 4: Simplify right side
   1,443.96x = 3,092,136.61
5. Step 5: Solve for x
   x = 3,092,136.61/1,443.96
6. Step 6: Final answer
   x = 2,141.43