Finding the Third Proportional to 1,253,355 and 1,909,409

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253,355 : 1,909,409 = 1,909,409 : x
2. Step 2: Convert to fraction form
   1,253,355/1,909,409 = 1,909,409/x
3. Step 3: Cross multiply
   1,253,355x = 1,909,409 × 1,909,409
4. Step 4: Simplify right side
   1,253,355x = 3,645,842,729,281
5. Step 5: Solve for x
   x = 3,645,842,729,281/1,253,355
6. Step 6: Final answer
   x = 2,908,866.78