Finding the Third Proportional to 21,918 and 31,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,918 : 31,234.50 = 31,234.50 : x
2. Step 2: Convert to fraction form
   21,918/31,234.50 = 31,234.50/x
3. Step 3: Cross multiply
   21,918x = 31,234.50 × 31,234.50
4. Step 4: Simplify right side
   21,918x = 975,593,990.25
5. Step 5: Solve for x
   x = 975,593,990.25/21,918
6. Step 6: Final answer
   x = 44,511.09