Finding the Fourth Proportional to 3,957.39, 5,906.86 and 3,490.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,957.39 : 5,906.86 = 3,490.46 : x
2. Step 2: Convert to fraction form
   3,957.39/5,906.86 = 3,490.46/x
3. Step 3: Cross multiply
   3,957.39x = 5,906.86 × 3,490.46
4. Step 4: Simplify right side
   3,957.39x = 20,617,642.45
5. Step 5: Solve for x
   x = 20,617,642.45/3,957.39
6. Step 6: Final answer
   x = 5,209.91