Finding the Third Proportional to 51,870 and 80,107.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,870 : 80,107.50 = 80,107.50 : x
2. Step 2: Convert to fraction form
   51,870/80,107.50 = 80,107.50/x
3. Step 3: Cross multiply
   51,870x = 80,107.50 × 80,107.50
4. Step 4: Simplify right side
   51,870x = 6,417,211,556.25
5. Step 5: Solve for x
   x = 6,417,211,556.25/51,870
6. Step 6: Final answer
   x = 123,717.21