Finding the Third Proportional to 21,222.38 and 28,719.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,222.38 : 28,719.56 = 28,719.56 : x
2. Step 2: Convert to fraction form
   21,222.38/28,719.56 = 28,719.56/x
3. Step 3: Cross multiply
   21,222.38x = 28,719.56 × 28,719.56
4. Step 4: Simplify right side
   21,222.38x = 824,813,270.19
5. Step 5: Solve for x
   x = 824,813,270.19/21,222.38
6. Step 6: Final answer
   x = 38,865.27