Finding the Third Proportional to 21,520.69 and 29,668.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,520.69 : 29,668.78 = 29,668.78 : x
2. Step 2: Convert to fraction form
   21,520.69/29,668.78 = 29,668.78/x
3. Step 3: Cross multiply
   21,520.69x = 29,668.78 × 29,668.78
4. Step 4: Simplify right side
   21,520.69x = 880,236,580.86
5. Step 5: Solve for x
   x = 880,236,580.86/21,520.69
6. Step 6: Final answer
   x = 40,901.88