Finding the Fourth Proportional to 7,057.09, 9,738.56 and 3,870.22

Step by Step Solution

1. Step 1: Write the proportion equation
   7,057.09 : 9,738.56 = 3,870.22 : x
2. Step 2: Convert to fraction form
   7,057.09/9,738.56 = 3,870.22/x
3. Step 3: Cross multiply
   7,057.09x = 9,738.56 × 3,870.22
4. Step 4: Simplify right side
   7,057.09x = 37,690,355.01
5. Step 5: Solve for x
   x = 37,690,355.01/7,057.09
6. Step 6: Final answer
   x = 5,340.78