Finding the Fourth Proportional to 5,665.91, 7,818.50 and 3,147.71

Step by Step Solution

1. Step 1: Write the proportion equation
   5,665.91 : 7,818.50 = 3,147.71 : x
2. Step 2: Convert to fraction form
   5,665.91/7,818.50 = 3,147.71/x
3. Step 3: Cross multiply
   5,665.91x = 7,818.50 × 3,147.71
4. Step 4: Simplify right side
   5,665.91x = 24,610,354.90
5. Step 5: Solve for x
   x = 24,610,354.90/5,665.91
6. Step 6: Final answer
   x = 4,343.58