Finding the Third Proportional to 1,269,840 and 1,729,272

Step by Step Solution

1. Step 1: Write the proportion equation
   1,269,840 : 1,729,272 = 1,729,272 : x
2. Step 2: Convert to fraction form
   1,269,840/1,729,272 = 1,729,272/x
3. Step 3: Cross multiply
   1,269,840x = 1,729,272 × 1,729,272
4. Step 4: Simplify right side
   1,269,840x = 2,990,381,649,984
5. Step 5: Solve for x
   x = 2,990,381,649,984/1,269,840
6. Step 6: Final answer
   x = 2,354,927.90