Finding the Third Proportional to 409,549.50 and 641,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   409,549.50 : 641,061.50 = 641,061.50 : x
2. Step 2: Convert to fraction form
   409,549.50/641,061.50 = 641,061.50/x
3. Step 3: Cross multiply
   409,549.50x = 641,061.50 × 641,061.50
4. Step 4: Simplify right side
   409,549.50x = 410,959,846,782.25
5. Step 5: Solve for x
   x = 410,959,846,782.25/409,549.50
6. Step 6: Final answer
   x = 1,003,443.65