Finding the Third Proportional to 391,446 and 751,788

Step by Step Solution

1. Step 1: Write the proportion equation
   391,446 : 751,788 = 751,788 : x
2. Step 2: Convert to fraction form
   391,446/751,788 = 751,788/x
3. Step 3: Cross multiply
   391,446x = 751,788 × 751,788
4. Step 4: Simplify right side
   391,446x = 565,185,196,944
5. Step 5: Solve for x
   x = 565,185,196,944/391,446
6. Step 6: Final answer
   x = 1,443,839.50