Finding the Fourth Proportional to 4,902.72, 7,323.78 and 3,930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,902.72 : 7,323.78 = 3,930.72 : x
2. Step 2: Convert to fraction form
   4,902.72/7,323.78 = 3,930.72/x
3. Step 3: Cross multiply
   4,902.72x = 7,323.78 × 3,930.72
4. Step 4: Simplify right side
   4,902.72x = 28,787,728.52
5. Step 5: Solve for x
   x = 28,787,728.52/4,902.72
6. Step 6: Final answer
   x = 5,871.79