Finding the Third Proportional to 548,485 and 875,856

Step by Step Solution

1. Step 1: Write the proportion equation
   548,485 : 875,856 = 875,856 : x
2. Step 2: Convert to fraction form
   548,485/875,856 = 875,856/x
3. Step 3: Cross multiply
   548,485x = 875,856 × 875,856
4. Step 4: Simplify right side
   548,485x = 767,123,732,736
5. Step 5: Solve for x
   x = 767,123,732,736/548,485
6. Step 6: Final answer
   x = 1,398,622.99