Finding the Fourth Proportional to 2,162.39, 2,980.99 and 1,540.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.39 : 2,980.99 = 1,540.31 : x
2. Step 2: Convert to fraction form
   2,162.39/2,980.99 = 1,540.31/x
3. Step 3: Cross multiply
   2,162.39x = 2,980.99 × 1,540.31
4. Step 4: Simplify right side
   2,162.39x = 4,591,658.08
5. Step 5: Solve for x
   x = 4,591,658.08/2,162.39
6. Step 6: Final answer
   x = 2,123.42