Finding the Fourth Proportional to 2,631.71, 3,949.08 and 1,071.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.71 : 3,949.08 = 1,071.43 : x
2. Step 2: Convert to fraction form
   2,631.71/3,949.08 = 1,071.43/x
3. Step 3: Cross multiply
   2,631.71x = 3,949.08 × 1,071.43
4. Step 4: Simplify right side
   2,631.71x = 4,231,162.78
5. Step 5: Solve for x
   x = 4,231,162.78/2,631.71
6. Step 6: Final answer
   x = 1,607.76