Finding the Third Proportional to 67,815 and 102,217.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,815 : 102,217.50 = 102,217.50 : x
2. Step 2: Convert to fraction form
   67,815/102,217.50 = 102,217.50/x
3. Step 3: Cross multiply
   67,815x = 102,217.50 × 102,217.50
4. Step 4: Simplify right side
   67,815x = 10,448,417,306.25
5. Step 5: Solve for x
   x = 10,448,417,306.25/67,815
6. Step 6: Final answer
   x = 154,072.36