Finding the Fourth Proportional to 2,487.34, 3,432.32 and 1,439.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487.34 : 3,432.32 = 1,439.47 : x
2. Step 2: Convert to fraction form
   2,487.34/3,432.32 = 1,439.47/x
3. Step 3: Cross multiply
   2,487.34x = 3,432.32 × 1,439.47
4. Step 4: Simplify right side
   2,487.34x = 4,940,721.67
5. Step 5: Solve for x
   x = 4,940,721.67/2,487.34
6. Step 6: Final answer
   x = 1,986.35