Finding the Fourth Proportional to 3,947.03, 5,915.98 and 3,171.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.03 : 5,915.98 = 3,171.86 : x
2. Step 2: Convert to fraction form
   3,947.03/5,915.98 = 3,171.86/x
3. Step 3: Cross multiply
   3,947.03x = 5,915.98 × 3,171.86
4. Step 4: Simplify right side
   3,947.03x = 18,764,660.32
5. Step 5: Solve for x
   x = 18,764,660.32/3,947.03
6. Step 6: Final answer
   x = 4,754.12