Finding the Third Proportional to 21,173 and 31,126

Step by Step Solution

1. Step 1: Write the proportion equation
   21,173 : 31,126 = 31,126 : x
2. Step 2: Convert to fraction form
   21,173/31,126 = 31,126/x
3. Step 3: Cross multiply
   21,173x = 31,126 × 31,126
4. Step 4: Simplify right side
   21,173x = 968,827,876
5. Step 5: Solve for x
   x = 968,827,876/21,173
6. Step 6: Final answer
   x = 45,757.70