Finding the Third Proportional to 21,224.25 and 28,722.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,224.25 : 28,722.47 = 28,722.47 : x
2. Step 2: Convert to fraction form
   21,224.25/28,722.47 = 28,722.47/x
3. Step 3: Cross multiply
   21,224.25x = 28,722.47 × 28,722.47
4. Step 4: Simplify right side
   21,224.25x = 824,980,211.09
5. Step 5: Solve for x
   x = 824,980,211.09/21,224.25
6. Step 6: Final answer
   x = 38,869.70