Finding the Third Proportional to 756,866 and 1,138,458

Step by Step Solution

1. Step 1: Write the proportion equation
   756,866 : 1,138,458 = 1,138,458 : x
2. Step 2: Convert to fraction form
   756,866/1,138,458 = 1,138,458/x
3. Step 3: Cross multiply
   756,866x = 1,138,458 × 1,138,458
4. Step 4: Simplify right side
   756,866x = 1,296,086,617,764
5. Step 5: Solve for x
   x = 1,296,086,617,764/756,866
6. Step 6: Final answer
   x = 1,712,438.69