Finding the Third Proportional to 521,686 and 1,143,128

Step by Step Solution

1. Step 1: Write the proportion equation
   521,686 : 1,143,128 = 1,143,128 : x
2. Step 2: Convert to fraction form
   521,686/1,143,128 = 1,143,128/x
3. Step 3: Cross multiply
   521,686x = 1,143,128 × 1,143,128
4. Step 4: Simplify right side
   521,686x = 1,306,741,624,384
5. Step 5: Solve for x
   x = 1,306,741,624,384/521,686
6. Step 6: Final answer
   x = 2,504,843.19