Finding the Third Proportional to 15,273.56 and 20,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,273.56 : 20,128.50 = 20,128.50 : x
2. Step 2: Convert to fraction form
   15,273.56/20,128.50 = 20,128.50/x
3. Step 3: Cross multiply
   15,273.56x = 20,128.50 × 20,128.50
4. Step 4: Simplify right side
   15,273.56x = 405,156,512.25
5. Step 5: Solve for x
   x = 405,156,512.25/15,273.56
6. Step 6: Final answer
   x = 26,526.65