Finding the Third Proportional to 15,187.50 and 20,666.25

Step by Step Solution

1. Step 1: Write the proportion equation
   15,187.50 : 20,666.25 = 20,666.25 : x
2. Step 2: Convert to fraction form
   15,187.50/20,666.25 = 20,666.25/x
3. Step 3: Cross multiply
   15,187.50x = 20,666.25 × 20,666.25
4. Step 4: Simplify right side
   15,187.50x = 427,093,889.06
5. Step 5: Solve for x
   x = 427,093,889.06/15,187.50
6. Step 6: Final answer
   x = 28,121.41