Finding the Third Proportional to 21,520.25 and 31,424.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,520.25 : 31,424.25 = 31,424.25 : x
2. Step 2: Convert to fraction form
   21,520.25/31,424.25 = 31,424.25/x
3. Step 3: Cross multiply
   21,520.25x = 31,424.25 × 31,424.25
4. Step 4: Simplify right side
   21,520.25x = 987,483,488.06
5. Step 5: Solve for x
   x = 987,483,488.06/21,520.25
6. Step 6: Final answer
   x = 45,886.25