Finding the Third Proportional to 36,139.50 and 87,059.25

Step by Step Solution

1. Step 1: Write the proportion equation
   36,139.50 : 87,059.25 = 87,059.25 : x
2. Step 2: Convert to fraction form
   36,139.50/87,059.25 = 87,059.25/x
3. Step 3: Cross multiply
   36,139.50x = 87,059.25 × 87,059.25
4. Step 4: Simplify right side
   36,139.50x = 7,579,313,010.56
5. Step 5: Solve for x
   x = 7,579,313,010.56/36,139.50
6. Step 6: Final answer
   x = 209,723.79