Finding the Third Proportional to 21,190.25 and 31,137.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,190.25 : 31,137.25 = 31,137.25 : x
2. Step 2: Convert to fraction form
   21,190.25/31,137.25 = 31,137.25/x
3. Step 3: Cross multiply
   21,190.25x = 31,137.25 × 31,137.25
4. Step 4: Simplify right side
   21,190.25x = 969,528,337.56
5. Step 5: Solve for x
   x = 969,528,337.56/21,190.25
6. Step 6: Final answer
   x = 45,753.51