Finding the Third Proportional to 756,820 and 1,138,419

Step by Step Solution

1. Step 1: Write the proportion equation
   756,820 : 1,138,419 = 1,138,419 : x
2. Step 2: Convert to fraction form
   756,820/1,138,419 = 1,138,419/x
3. Step 3: Cross multiply
   756,820x = 1,138,419 × 1,138,419
4. Step 4: Simplify right side
   756,820x = 1,295,997,819,561
5. Step 5: Solve for x
   x = 1,295,997,819,561/756,820
6. Step 6: Final answer
   x = 1,712,425.44