Finding the Third Proportional to 40,128.75 and 87,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   40,128.75 : 87,871.50 = 87,871.50 : x
2. Step 2: Convert to fraction form
   40,128.75/87,871.50 = 87,871.50/x
3. Step 3: Cross multiply
   40,128.75x = 87,871.50 × 87,871.50
4. Step 4: Simplify right side
   40,128.75x = 7,721,400,512.25
5. Step 5: Solve for x
   x = 7,721,400,512.25/40,128.75
6. Step 6: Final answer
   x = 192,415.67