Finding the Third Proportional to 40,257.50 and 87,440.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,257.50 : 87,440.50 = 87,440.50 : x
2. Step 2: Convert to fraction form
   40,257.50/87,440.50 = 87,440.50/x
3. Step 3: Cross multiply
   40,257.50x = 87,440.50 × 87,440.50
4. Step 4: Simplify right side
   40,257.50x = 7,645,841,040.25
5. Step 5: Solve for x
   x = 7,645,841,040.25/40,257.50
6. Step 6: Final answer
   x = 189,923.39