Finding the Third Proportional to 396,580.50 and 604,164

Step by Step Solution

1. Step 1: Write the proportion equation
   396,580.50 : 604,164 = 604,164 : x
2. Step 2: Convert to fraction form
   396,580.50/604,164 = 604,164/x
3. Step 3: Cross multiply
   396,580.50x = 604,164 × 604,164
4. Step 4: Simplify right side
   396,580.50x = 365,014,138,896
5. Step 5: Solve for x
   x = 365,014,138,896/396,580.50
6. Step 6: Final answer
   x = 920,403.65