Finding the Fourth Proportional to 3,971.43, 5,939.64 and 3,535.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.43 : 5,939.64 = 3,535.79 : x
2. Step 2: Convert to fraction form
   3,971.43/5,939.64 = 3,535.79/x
3. Step 3: Cross multiply
   3,971.43x = 5,939.64 × 3,535.79
4. Step 4: Simplify right side
   3,971.43x = 21,001,290.02
5. Step 5: Solve for x
   x = 21,001,290.02/3,971.43
6. Step 6: Final answer
   x = 5,288.09