Finding the Fourth Proportional to 9,710.68, 13,399.86 and 5,518.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,710.68 : 13,399.86 = 5,518.12 : x
2. Step 2: Convert to fraction form
   9,710.68/13,399.86 = 5,518.12/x
3. Step 3: Cross multiply
   9,710.68x = 13,399.86 × 5,518.12
4. Step 4: Simplify right side
   9,710.68x = 73,942,035.46
5. Step 5: Solve for x
   x = 73,942,035.46/9,710.68
6. Step 6: Final answer
   x = 7,614.51