Finding the Fourth Proportional to 3,906.96, 5,390.88 and 2,334.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,906.96 : 5,390.88 = 2,334.72 : x
2. Step 2: Convert to fraction form
   3,906.96/5,390.88 = 2,334.72/x
3. Step 3: Cross multiply
   3,906.96x = 5,390.88 × 2,334.72
4. Step 4: Simplify right side
   3,906.96x = 12,586,195.35
5. Step 5: Solve for x
   x = 12,586,195.35/3,906.96
6. Step 6: Final answer
   x = 3,221.48