Finding the Third Proportional to 15,112 and 21,243.50

Step by Step Solution

1. Step 1: Write the proportion equation
   15,112 : 21,243.50 = 21,243.50 : x
2. Step 2: Convert to fraction form
   15,112/21,243.50 = 21,243.50/x
3. Step 3: Cross multiply
   15,112x = 21,243.50 × 21,243.50
4. Step 4: Simplify right side
   15,112x = 451,286,292.25
5. Step 5: Solve for x
   x = 451,286,292.25/15,112
6. Step 6: Final answer
   x = 29,862.78