Finding the Fourth Proportional to 7,739.59, 10,689.42 and 5,217.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,739.59 : 10,689.42 = 5,217.34 : x
2. Step 2: Convert to fraction form
   7,739.59/10,689.42 = 5,217.34/x
3. Step 3: Cross multiply
   7,739.59x = 10,689.42 × 5,217.34
4. Step 4: Simplify right side
   7,739.59x = 55,770,338.54
5. Step 5: Solve for x
   x = 55,770,338.54/7,739.59
6. Step 6: Final answer
   x = 7,205.85