Finding the Third Proportional to 409,548 and 641,058.75

Step by Step Solution

1. Step 1: Write the proportion equation
   409,548 : 641,058.75 = 641,058.75 : x
2. Step 2: Convert to fraction form
   409,548/641,058.75 = 641,058.75/x
3. Step 3: Cross multiply
   409,548x = 641,058.75 × 641,058.75
4. Step 4: Simplify right side
   409,548x = 410,956,320,951.56
5. Step 5: Solve for x
   x = 410,956,320,951.56/409,548
6. Step 6: Final answer
   x = 1,003,438.72