Finding the Fourth Proportional to 6,448.29, 8,900.22 and 3,931.79

Step by Step Solution

1. Step 1: Write the proportion equation
   6,448.29 : 8,900.22 = 3,931.79 : x
2. Step 2: Convert to fraction form
   6,448.29/8,900.22 = 3,931.79/x
3. Step 3: Cross multiply
   6,448.29x = 8,900.22 × 3,931.79
4. Step 4: Simplify right side
   6,448.29x = 34,993,791.27
5. Step 5: Solve for x
   x = 34,993,791.27/6,448.29
6. Step 6: Final answer
   x = 5,426.83