Finding the Fourth Proportional to 4,900.32, 7,320.96 and 3,906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,900.32 : 7,320.96 = 3,906.72 : x
2. Step 2: Convert to fraction form
   4,900.32/7,320.96 = 3,906.72/x
3. Step 3: Cross multiply
   4,900.32x = 7,320.96 × 3,906.72
4. Step 4: Simplify right side
   4,900.32x = 28,600,940.85
5. Step 5: Solve for x
   x = 28,600,940.85/4,900.32
6. Step 6: Final answer
   x = 5,836.55