Finding the Fourth Proportional to 3,957.64, 5,907.23 and 3,490.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,957.64 : 5,907.23 = 3,490.71 : x
2. Step 2: Convert to fraction form
   3,957.64/5,907.23 = 3,490.71/x
3. Step 3: Cross multiply
   3,957.64x = 5,907.23 × 3,490.71
4. Step 4: Simplify right side
   3,957.64x = 20,620,426.83
5. Step 5: Solve for x
   x = 20,620,426.83/3,957.64
6. Step 6: Final answer
   x = 5,210.28