Finding the Third Proportional to 4,222.69 and 5,479.31

Step by Step Solution

1. Step 1: Write the proportion equation
   4,222.69 : 5,479.31 = 5,479.31 : x
2. Step 2: Convert to fraction form
   4,222.69/5,479.31 = 5,479.31/x
3. Step 3: Cross multiply
   4,222.69x = 5,479.31 × 5,479.31
4. Step 4: Simplify right side
   4,222.69x = 30,022,865.47
5. Step 5: Solve for x
   x = 30,022,865.47/4,222.69
6. Step 6: Final answer
   x = 7,109.90