Finding the Third Proportional to 10,285.31 and 21,378.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,285.31 : 21,378.09 = 21,378.09 : x
2. Step 2: Convert to fraction form
   10,285.31/21,378.09 = 21,378.09/x
3. Step 3: Cross multiply
   10,285.31x = 21,378.09 × 21,378.09
4. Step 4: Simplify right side
   10,285.31x = 457,022,892.38
5. Step 5: Solve for x
   x = 457,022,892.38/10,285.31
6. Step 6: Final answer
   x = 44,434.52