Finding the Third Proportional to 4,618.69 and 9,910.69

Step by Step Solution

1. Step 1: Write the proportion equation
   4,618.69 : 9,910.69 = 9,910.69 : x
2. Step 2: Convert to fraction form
   4,618.69/9,910.69 = 9,910.69/x
3. Step 3: Cross multiply
   4,618.69x = 9,910.69 × 9,910.69
4. Step 4: Simplify right side
   4,618.69x = 98,221,726.72
5. Step 5: Solve for x
   x = 98,221,726.72/4,618.69
6. Step 6: Final answer
   x = 21,266.16