Finding the Third Proportional to 21,721.50 and 47,398.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,721.50 : 47,398.50 = 47,398.50 : x
2. Step 2: Convert to fraction form
   21,721.50/47,398.50 = 47,398.50/x
3. Step 3: Cross multiply
   21,721.50x = 47,398.50 × 47,398.50
4. Step 4: Simplify right side
   21,721.50x = 2,246,617,802.25
5. Step 5: Solve for x
   x = 2,246,617,802.25/21,721.50
6. Step 6: Final answer
   x = 103,428.30