Finding the Fourth Proportional to 2,287.91, 3,429.42 and 971.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,287.91 : 3,429.42 = 971.39 : x
2. Step 2: Convert to fraction form
   2,287.91/3,429.42 = 971.39/x
3. Step 3: Cross multiply
   2,287.91x = 3,429.42 × 971.39
4. Step 4: Simplify right side
   2,287.91x = 3,331,287.15
5. Step 5: Solve for x
   x = 3,331,287.15/2,287.91
6. Step 6: Final answer
   x = 1,456.04