Finding the Third Proportional to 2,218,213 and 4,541,321

Step by Step Solution

1. Step 1: Write the proportion equation
   2,218,213 : 4,541,321 = 4,541,321 : x
2. Step 2: Convert to fraction form
   2,218,213/4,541,321 = 4,541,321/x
3. Step 3: Cross multiply
   2,218,213x = 4,541,321 × 4,541,321
4. Step 4: Simplify right side
   2,218,213x = 20,623,596,425,041
5. Step 5: Solve for x
   x = 20,623,596,425,041/2,218,213
6. Step 6: Final answer
   x = 9,297,392.28