Finding the Third Proportional to 619,846 and 872,864

Step by Step Solution

1. Step 1: Write the proportion equation
   619,846 : 872,864 = 872,864 : x
2. Step 2: Convert to fraction form
   619,846/872,864 = 872,864/x
3. Step 3: Cross multiply
   619,846x = 872,864 × 872,864
4. Step 4: Simplify right side
   619,846x = 761,891,562,496
5. Step 5: Solve for x
   x = 761,891,562,496/619,846
6. Step 6: Final answer
   x = 1,229,162.67