Finding the Third Proportional to 9,337.78 and 19,819.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,337.78 : 19,819.69 = 19,819.69 : x
2. Step 2: Convert to fraction form
   9,337.78/19,819.69 = 19,819.69/x
3. Step 3: Cross multiply
   9,337.78x = 19,819.69 × 19,819.69
4. Step 4: Simplify right side
   9,337.78x = 392,820,012.60
5. Step 5: Solve for x
   x = 392,820,012.60/9,337.78
6. Step 6: Final answer
   x = 42,067.81