Finding the Third Proportional to 21,816.84 and 31,456.13

Step by Step Solution

1. Step 1: Write the proportion equation
   21,816.84 : 31,456.13 = 31,456.13 : x
2. Step 2: Convert to fraction form
   21,816.84/31,456.13 = 31,456.13/x
3. Step 3: Cross multiply
   21,816.84x = 31,456.13 × 31,456.13
4. Step 4: Simplify right side
   21,816.84x = 989,487,800.02
5. Step 5: Solve for x
   x = 989,487,800.02/21,816.84
6. Step 6: Final answer
   x = 45,354.31