Finding the Third Proportional to 9,903.94 and 20,631.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,903.94 : 20,631.38 = 20,631.38 : x
2. Step 2: Convert to fraction form
   9,903.94/20,631.38 = 20,631.38/x
3. Step 3: Cross multiply
   9,903.94x = 20,631.38 × 20,631.38
4. Step 4: Simplify right side
   9,903.94x = 425,653,634.39
5. Step 5: Solve for x
   x = 425,653,634.39/9,903.94
6. Step 6: Final answer
   x = 42,978.22