Finding the Third Proportional to 409,500.50 and 619,979

Step by Step Solution

1. Step 1: Write the proportion equation
   409,500.50 : 619,979 = 619,979 : x
2. Step 2: Convert to fraction form
   409,500.50/619,979 = 619,979/x
3. Step 3: Cross multiply
   409,500.50x = 619,979 × 619,979
4. Step 4: Simplify right side
   409,500.50x = 384,373,960,441
5. Step 5: Solve for x
   x = 384,373,960,441/409,500.50
6. Step 6: Final answer
   x = 938,641.00