Finding the Fourth Proportional to 5,651.22, 7,790.04 and 3,967.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,651.22 : 7,790.04 = 3,967.90 : x
2. Step 2: Convert to fraction form
   5,651.22/7,790.04 = 3,967.90/x
3. Step 3: Cross multiply
   5,651.22x = 7,790.04 × 3,967.90
4. Step 4: Simplify right side
   5,651.22x = 30,910,099.72
5. Step 5: Solve for x
   x = 30,910,099.72/5,651.22
6. Step 6: Final answer
   x = 5,469.63