Finding the Third Proportional to 485,638 and 735,230

Step by Step Solution

1. Step 1: Write the proportion equation
   485,638 : 735,230 = 735,230 : x
2. Step 2: Convert to fraction form
   485,638/735,230 = 735,230/x
3. Step 3: Cross multiply
   485,638x = 735,230 × 735,230
4. Step 4: Simplify right side
   485,638x = 540,563,152,900
5. Step 5: Solve for x
   x = 540,563,152,900/485,638
6. Step 6: Final answer
   x = 1,113,098.96