Finding the Third Proportional to 396,664 and 604,300

Step by Step Solution

1. Step 1: Write the proportion equation
   396,664 : 604,300 = 604,300 : x
2. Step 2: Convert to fraction form
   396,664/604,300 = 604,300/x
3. Step 3: Cross multiply
   396,664x = 604,300 × 604,300
4. Step 4: Simplify right side
   396,664x = 365,178,490,000
5. Step 5: Solve for x
   x = 365,178,490,000/396,664
6. Step 6: Final answer
   x = 920,624.23