Finding the Fourth Proportional to 7,144.05, 9,858.56 and 3,957.22

Step by Step Solution

1. Step 1: Write the proportion equation
   7,144.05 : 9,858.56 = 3,957.22 : x
2. Step 2: Convert to fraction form
   7,144.05/9,858.56 = 3,957.22/x
3. Step 3: Cross multiply
   7,144.05x = 9,858.56 × 3,957.22
4. Step 4: Simplify right side
   7,144.05x = 39,012,441.51
5. Step 5: Solve for x
   x = 39,012,441.51/7,144.05
6. Step 6: Final answer
   x = 5,460.83