Finding the Fourth Proportional to 7,020.78, 9,689.34 and 5,249.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,020.78 : 9,689.34 = 5,249.34 : x
2. Step 2: Convert to fraction form
   7,020.78/9,689.34 = 5,249.34/x
3. Step 3: Cross multiply
   7,020.78x = 9,689.34 × 5,249.34
4. Step 4: Simplify right side
   7,020.78x = 50,862,640.04
5. Step 5: Solve for x
   x = 50,862,640.04/7,020.78
6. Step 6: Final answer
   x = 7,244.59