Finding the Third Proportional to 728,126 and 1,139,716

Step by Step Solution

1. Step 1: Write the proportion equation
   728,126 : 1,139,716 = 1,139,716 : x
2. Step 2: Convert to fraction form
   728,126/1,139,716 = 1,139,716/x
3. Step 3: Cross multiply
   728,126x = 1,139,716 × 1,139,716
4. Step 4: Simplify right side
   728,126x = 1,298,952,560,656
5. Step 5: Solve for x
   x = 1,298,952,560,656/728,126
6. Step 6: Final answer
   x = 1,783,966.73