Finding the Third Proportional to 1,253,558 and 1,909,729

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253,558 : 1,909,729 = 1,909,729 : x
2. Step 2: Convert to fraction form
   1,253,558/1,909,729 = 1,909,729/x
3. Step 3: Cross multiply
   1,253,558x = 1,909,729 × 1,909,729
4. Step 4: Simplify right side
   1,253,558x = 3,647,064,853,441
5. Step 5: Solve for x
   x = 3,647,064,853,441/1,253,558
6. Step 6: Final answer
   x = 2,909,370.65