Finding the Third Proportional to 1,823,570 and 4,221,239

Step by Step Solution

1. Step 1: Write the proportion equation
   1,823,570 : 4,221,239 = 4,221,239 : x
2. Step 2: Convert to fraction form
   1,823,570/4,221,239 = 4,221,239/x
3. Step 3: Cross multiply
   1,823,570x = 4,221,239 × 4,221,239
4. Step 4: Simplify right side
   1,823,570x = 17,818,858,695,121
5. Step 5: Solve for x
   x = 17,818,858,695,121/1,823,570
6. Step 6: Final answer
   x = 9,771,414.69