Finding the Third Proportional to 21,080.25 and 31,610.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,080.25 : 31,610.25 = 31,610.25 : x
2. Step 2: Convert to fraction form
   21,080.25/31,610.25 = 31,610.25/x
3. Step 3: Cross multiply
   21,080.25x = 31,610.25 × 31,610.25
4. Step 4: Simplify right side
   21,080.25x = 999,207,905.06
5. Step 5: Solve for x
   x = 999,207,905.06/21,080.25
6. Step 6: Final answer
   x = 47,400.19