Finding the Third Proportional to 728,115 and 1,139,697

Step by Step Solution

1. Step 1: Write the proportion equation
   728,115 : 1,139,697 = 1,139,697 : x
2. Step 2: Convert to fraction form
   728,115/1,139,697 = 1,139,697/x
3. Step 3: Cross multiply
   728,115x = 1,139,697 × 1,139,697
4. Step 4: Simplify right side
   728,115x = 1,298,909,251,809
5. Step 5: Solve for x
   x = 1,298,909,251,809/728,115
6. Step 6: Final answer
   x = 1,783,934.20