Finding the Fourth Proportional to 3,847.76, 5,308.06 and 3,315.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,847.76 : 5,308.06 = 3,315.72 : x
2. Step 2: Convert to fraction form
   3,847.76/5,308.06 = 3,315.72/x
3. Step 3: Cross multiply
   3,847.76x = 5,308.06 × 3,315.72
4. Step 4: Simplify right side
   3,847.76x = 17,600,040.70
5. Step 5: Solve for x
   x = 17,600,040.70/3,847.76
6. Step 6: Final answer
   x = 4,574.10