Finding the Third Proportional to 90,387 and 187,942.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,387 : 187,942.50 = 187,942.50 : x
2. Step 2: Convert to fraction form
   90,387/187,942.50 = 187,942.50/x
3. Step 3: Cross multiply
   90,387x = 187,942.50 × 187,942.50
4. Step 4: Simplify right side
   90,387x = 35,322,383,306.25
5. Step 5: Solve for x
   x = 35,322,383,306.25/90,387
6. Step 6: Final answer
   x = 390,790.53