Finding the Third Proportional to 18,721.50 and 30,187.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,721.50 : 30,187.50 = 30,187.50 : x
2. Step 2: Convert to fraction form
   18,721.50/30,187.50 = 30,187.50/x
3. Step 3: Cross multiply
   18,721.50x = 30,187.50 × 30,187.50
4. Step 4: Simplify right side
   18,721.50x = 911,285,156.25
5. Step 5: Solve for x
   x = 911,285,156.25/18,721.50
6. Step 6: Final answer
   x = 48,675.86