Finding the Fourth Proportional to 3,957.89, 5,907.61 and 3,490.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,957.89 : 5,907.61 = 3,490.96 : x
2. Step 2: Convert to fraction form
   3,957.89/5,907.61 = 3,490.96/x
3. Step 3: Cross multiply
   3,957.89x = 5,907.61 × 3,490.96
4. Step 4: Simplify right side
   3,957.89x = 20,623,212.75
5. Step 5: Solve for x
   x = 20,623,212.75/3,957.89
6. Step 6: Final answer
   x = 5,210.66