Finding the Third Proportional to 30,316.50 and 70,815

Step by Step Solution

1. Step 1: Write the proportion equation
   30,316.50 : 70,815 = 70,815 : x
2. Step 2: Convert to fraction form
   30,316.50/70,815 = 70,815/x
3. Step 3: Cross multiply
   30,316.50x = 70,815 × 70,815
4. Step 4: Simplify right side
   30,316.50x = 5,014,764,225
5. Step 5: Solve for x
   x = 5,014,764,225/30,316.50
6. Step 6: Final answer
   x = 165,413.69