Finding the Third Proportional to 621,288 and 1,358,892

Step by Step Solution

1. Step 1: Write the proportion equation
   621,288 : 1,358,892 = 1,358,892 : x
2. Step 2: Convert to fraction form
   621,288/1,358,892 = 1,358,892/x
3. Step 3: Cross multiply
   621,288x = 1,358,892 × 1,358,892
4. Step 4: Simplify right side
   621,288x = 1,846,587,467,664
5. Step 5: Solve for x
   x = 1,846,587,467,664/621,288
6. Step 6: Final answer
   x = 2,972,192.39