Finding the Fourth Proportional to 2,485.91, 3,432.15 and 1,543.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,485.91 : 3,432.15 = 1,543.09 : x
2. Step 2: Convert to fraction form
   2,485.91/3,432.15 = 1,543.09/x
3. Step 3: Cross multiply
   2,485.91x = 3,432.15 × 1,543.09
4. Step 4: Simplify right side
   2,485.91x = 5,296,105.03
5. Step 5: Solve for x
   x = 5,296,105.03/2,485.91
6. Step 6: Final answer
   x = 2,130.45