Finding the Fourth Proportional to 6,441.72, 9,661.14 and 3,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,441.72 : 9,661.14 = 3,151.50 : x
2. Step 2: Convert to fraction form
   6,441.72/9,661.14 = 3,151.50/x
3. Step 3: Cross multiply
   6,441.72x = 9,661.14 × 3,151.50
4. Step 4: Simplify right side
   6,441.72x = 30,447,082.71
5. Step 5: Solve for x
   x = 30,447,082.71/6,441.72
6. Step 6: Final answer
   x = 4,726.55