Finding the Third Proportional to 619,362 and 905,155

Step by Step Solution

1. Step 1: Write the proportion equation
   619,362 : 905,155 = 905,155 : x
2. Step 2: Convert to fraction form
   619,362/905,155 = 905,155/x
3. Step 3: Cross multiply
   619,362x = 905,155 × 905,155
4. Step 4: Simplify right side
   619,362x = 819,305,574,025
5. Step 5: Solve for x
   x = 819,305,574,025/619,362
6. Step 6: Final answer
   x = 1,322,821.83