Finding the Third Proportional to 19,515.94 and 38,910.38

Step by Step Solution

1. Step 1: Write the proportion equation
   19,515.94 : 38,910.38 = 38,910.38 : x
2. Step 2: Convert to fraction form
   19,515.94/38,910.38 = 38,910.38/x
3. Step 3: Cross multiply
   19,515.94x = 38,910.38 × 38,910.38
4. Step 4: Simplify right side
   19,515.94x = 1,514,017,282.64
5. Step 5: Solve for x
   x = 1,514,017,282.64/19,515.94
6. Step 6: Final answer
   x = 77,578.51