Finding the Third Proportional to 9,910.69 and 13,212.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.69 : 13,212.28 = 13,212.28 : x
2. Step 2: Convert to fraction form
   9,910.69/13,212.28 = 13,212.28/x
3. Step 3: Cross multiply
   9,910.69x = 13,212.28 × 13,212.28
4. Step 4: Simplify right side
   9,910.69x = 174,564,375.83
5. Step 5: Solve for x
   x = 174,564,375.83/9,910.69
6. Step 6: Final answer
   x = 17,613.75