Finding the Third Proportional to 30,210 and 71,212.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,210 : 71,212.50 = 71,212.50 : x
2. Step 2: Convert to fraction form
   30,210/71,212.50 = 71,212.50/x
3. Step 3: Cross multiply
   30,210x = 71,212.50 × 71,212.50
4. Step 4: Simplify right side
   30,210x = 5,071,220,156.25
5. Step 5: Solve for x
   x = 5,071,220,156.25/30,210
6. Step 6: Final answer
   x = 167,865.61