Finding the Third Proportional to 1,187,431 and 2,315,447

Step by Step Solution

1. Step 1: Write the proportion equation
   1,187,431 : 2,315,447 = 2,315,447 : x
2. Step 2: Convert to fraction form
   1,187,431/2,315,447 = 2,315,447/x
3. Step 3: Cross multiply
   1,187,431x = 2,315,447 × 2,315,447
4. Step 4: Simplify right side
   1,187,431x = 5,361,294,809,809
5. Step 5: Solve for x
   x = 5,361,294,809,809/1,187,431
6. Step 6: Final answer
   x = 4,515,036.92