Finding the Fourth Proportional to 5,689.30, 7,851.49 and 3,171.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,689.30 : 7,851.49 = 3,171.42 : x
2. Step 2: Convert to fraction form
   5,689.30/7,851.49 = 3,171.42/x
3. Step 3: Cross multiply
   5,689.30x = 7,851.49 × 3,171.42
4. Step 4: Simplify right side
   5,689.30x = 24,900,411.77
5. Step 5: Solve for x
   x = 24,900,411.77/5,689.30
6. Step 6: Final answer
   x = 4,376.71