Finding the Third Proportional to 1,086,272 and 1,643,390

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,272 : 1,643,390 = 1,643,390 : x
2. Step 2: Convert to fraction form
   1,086,272/1,643,390 = 1,643,390/x
3. Step 3: Cross multiply
   1,086,272x = 1,643,390 × 1,643,390
4. Step 4: Simplify right side
   1,086,272x = 2,700,730,692,100
5. Step 5: Solve for x
   x = 2,700,730,692,100/1,086,272
6. Step 6: Final answer
   x = 2,486,237.97