Finding the Third Proportional to 1,272,018 and 1,721,403

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272,018 : 1,721,403 = 1,721,403 : x
2. Step 2: Convert to fraction form
   1,272,018/1,721,403 = 1,721,403/x
3. Step 3: Cross multiply
   1,272,018x = 1,721,403 × 1,721,403
4. Step 4: Simplify right side
   1,272,018x = 2,963,228,288,409
5. Step 5: Solve for x
   x = 2,963,228,288,409/1,272,018
6. Step 6: Final answer
   x = 2,329,549.02