Finding the Third Proportional to 1,823,560 and 4,221,215

Step by Step Solution

1. Step 1: Write the proportion equation
   1,823,560 : 4,221,215 = 4,221,215 : x
2. Step 2: Convert to fraction form
   1,823,560/4,221,215 = 4,221,215/x
3. Step 3: Cross multiply
   1,823,560x = 4,221,215 × 4,221,215
4. Step 4: Simplify right side
   1,823,560x = 17,818,656,076,225
5. Step 5: Solve for x
   x = 17,818,656,076,225/1,823,560
6. Step 6: Final answer
   x = 9,771,357.17