Finding the Fourth Proportional to 5,688.69, 7,853.49 and 3,929.76

Step by Step Solution

1. Step 1: Write the proportion equation
   5,688.69 : 7,853.49 = 3,929.76 : x
2. Step 2: Convert to fraction form
   5,688.69/7,853.49 = 3,929.76/x
3. Step 3: Cross multiply
   5,688.69x = 7,853.49 × 3,929.76
4. Step 4: Simplify right side
   5,688.69x = 30,862,330.86
5. Step 5: Solve for x
   x = 30,862,330.86/5,688.69
6. Step 6: Final answer
   x = 5,425.21