Finding the Third Proportional to 409,551.75 and 641,061

Step by Step Solution

1. Step 1: Write the proportion equation
   409,551.75 : 641,061 = 641,061 : x
2. Step 2: Convert to fraction form
   409,551.75/641,061 = 641,061/x
3. Step 3: Cross multiply
   409,551.75x = 641,061 × 641,061
4. Step 4: Simplify right side
   409,551.75x = 410,959,205,721
5. Step 5: Solve for x
   x = 410,959,205,721/409,551.75
6. Step 6: Final answer
   x = 1,003,436.58