Finding the Third Proportional to 59,477.50 and 87,572.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,477.50 : 87,572.50 = 87,572.50 : x
2. Step 2: Convert to fraction form
   59,477.50/87,572.50 = 87,572.50/x
3. Step 3: Cross multiply
   59,477.50x = 87,572.50 × 87,572.50
4. Step 4: Simplify right side
   59,477.50x = 7,668,942,756.25
5. Step 5: Solve for x
   x = 7,668,942,756.25/59,477.50
6. Step 6: Final answer
   x = 128,938.55