Finding the Fourth Proportional to 9,709.48, 13,398.82 and 5,518.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,709.48 : 13,398.82 = 5,518.12 : x
2. Step 2: Convert to fraction form
   9,709.48/13,398.82 = 5,518.12/x
3. Step 3: Cross multiply
   9,709.48x = 13,398.82 × 5,518.12
4. Step 4: Simplify right side
   9,709.48x = 73,936,296.62
5. Step 5: Solve for x
   x = 73,936,296.62/9,709.48
6. Step 6: Final answer
   x = 7,614.86