Finding the Fourth Proportional to 3,859.61, 5,321.27 and 3,150.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.61 : 5,321.27 = 3,150.72 : x
2. Step 2: Convert to fraction form
   3,859.61/5,321.27 = 3,150.72/x
3. Step 3: Cross multiply
   3,859.61x = 5,321.27 × 3,150.72
4. Step 4: Simplify right side
   3,859.61x = 16,765,816.06
5. Step 5: Solve for x
   x = 16,765,816.06/3,859.61
6. Step 6: Final answer
   x = 4,343.92