Finding the Third Proportional to 21,123.28 and 28,451.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,123.28 : 28,451.25 = 28,451.25 : x
2. Step 2: Convert to fraction form
   21,123.28/28,451.25 = 28,451.25/x
3. Step 3: Cross multiply
   21,123.28x = 28,451.25 × 28,451.25
4. Step 4: Simplify right side
   21,123.28x = 809,473,626.56
5. Step 5: Solve for x
   x = 809,473,626.56/21,123.28
6. Step 6: Final answer
   x = 38,321.40