Finding the Third Proportional to 643,256 and 1,369,710

Step by Step Solution

1. Step 1: Write the proportion equation
   643,256 : 1,369,710 = 1,369,710 : x
2. Step 2: Convert to fraction form
   643,256/1,369,710 = 1,369,710/x
3. Step 3: Cross multiply
   643,256x = 1,369,710 × 1,369,710
4. Step 4: Simplify right side
   643,256x = 1,876,105,484,100
5. Step 5: Solve for x
   x = 1,876,105,484,100/643,256
6. Step 6: Final answer
   x = 2,916,576.73