Finding the Third Proportional to 151,218 and 321,552

Step by Step Solution

1. Step 1: Write the proportion equation
   151,218 : 321,552 = 321,552 : x
2. Step 2: Convert to fraction form
   151,218/321,552 = 321,552/x
3. Step 3: Cross multiply
   151,218x = 321,552 × 321,552
4. Step 4: Simplify right side
   151,218x = 103,395,688,704
5. Step 5: Solve for x
   x = 103,395,688,704/151,218
6. Step 6: Final answer
   x = 683,752.52