Finding the Third Proportional to 21,171.38 and 31,109.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,171.38 : 31,109.06 = 31,109.06 : x
2. Step 2: Convert to fraction form
   21,171.38/31,109.06 = 31,109.06/x
3. Step 3: Cross multiply
   21,171.38x = 31,109.06 × 31,109.06
4. Step 4: Simplify right side
   21,171.38x = 967,773,769.63
5. Step 5: Solve for x
   x = 967,773,769.63/21,171.38
6. Step 6: Final answer
   x = 45,711.43