Finding the Third Proportional to 258,728 and 565,549.75

Step by Step Solution

1. Step 1: Write the proportion equation
   258,728 : 565,549.75 = 565,549.75 : x
2. Step 2: Convert to fraction form
   258,728/565,549.75 = 565,549.75/x
3. Step 3: Cross multiply
   258,728x = 565,549.75 × 565,549.75
4. Step 4: Simplify right side
   258,728x = 319,846,519,725.06
5. Step 5: Solve for x
   x = 319,846,519,725.06/258,728
6. Step 6: Final answer
   x = 1,236,226.92