Finding the Fourth Proportional to 5,151.24, 7,720.98 and 3,923.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,151.24 : 7,720.98 = 3,923.78 : x
2. Step 2: Convert to fraction form
   5,151.24/7,720.98 = 3,923.78/x
3. Step 3: Cross multiply
   5,151.24x = 7,720.98 × 3,923.78
4. Step 4: Simplify right side
   5,151.24x = 30,295,426.90
5. Step 5: Solve for x
   x = 30,295,426.90/5,151.24
6. Step 6: Final answer
   x = 5,881.19