Finding the Third Proportional to 9,688.78 and 20,926.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,688.78 : 20,926.69 = 20,926.69 : x
2. Step 2: Convert to fraction form
   9,688.78/20,926.69 = 20,926.69/x
3. Step 3: Cross multiply
   9,688.78x = 20,926.69 × 20,926.69
4. Step 4: Simplify right side
   9,688.78x = 437,926,249.72
5. Step 5: Solve for x
   x = 437,926,249.72/9,688.78
6. Step 6: Final answer
   x = 45,199.31