Finding the Third Proportional to 20,128.50 and 28,316.25

Step by Step Solution

1. Step 1: Write the proportion equation
   20,128.50 : 28,316.25 = 28,316.25 : x
2. Step 2: Convert to fraction form
   20,128.50/28,316.25 = 28,316.25/x
3. Step 3: Cross multiply
   20,128.50x = 28,316.25 × 28,316.25
4. Step 4: Simplify right side
   20,128.50x = 801,810,014.06
5. Step 5: Solve for x
   x = 801,810,014.06/20,128.50
6. Step 6: Final answer
   x = 39,834.56