Finding the Third Proportional to 3,087,212 and 7,215,020

Step by Step Solution

1. Step 1: Write the proportion equation
   3,087,212 : 7,215,020 = 7,215,020 : x
2. Step 2: Convert to fraction form
   3,087,212/7,215,020 = 7,215,020/x
3. Step 3: Cross multiply
   3,087,212x = 7,215,020 × 7,215,020
4. Step 4: Simplify right side
   3,087,212x = 52,056,513,600,400
5. Step 5: Solve for x
   x = 52,056,513,600,400/3,087,212
6. Step 6: Final answer
   x = 16,861,982.14