Finding the Fourth Proportional to 2,488.40, 3,432.70 and 1,543.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.40 : 3,432.70 = 1,543.89 : x
2. Step 2: Convert to fraction form
   2,488.40/3,432.70 = 1,543.89/x
3. Step 3: Cross multiply
   2,488.40x = 3,432.70 × 1,543.89
4. Step 4: Simplify right side
   2,488.40x = 5,299,717.32
5. Step 5: Solve for x
   x = 5,299,717.32/2,488.40
6. Step 6: Final answer
   x = 2,129.77