Finding the Fourth Proportional to 5,605.29, 7,727.22 and 3,921.48

Step by Step Solution

1. Step 1: Write the proportion equation
   5,605.29 : 7,727.22 = 3,921.48 : x
2. Step 2: Convert to fraction form
   5,605.29/7,727.22 = 3,921.48/x
3. Step 3: Cross multiply
   5,605.29x = 7,727.22 × 3,921.48
4. Step 4: Simplify right side
   5,605.29x = 30,302,138.69
5. Step 5: Solve for x
   x = 30,302,138.69/5,605.29
6. Step 6: Final answer
   x = 5,405.99