Finding the Third Proportional to 151,499 and 318,672

Step by Step Solution

1. Step 1: Write the proportion equation
   151,499 : 318,672 = 318,672 : x
2. Step 2: Convert to fraction form
   151,499/318,672 = 318,672/x
3. Step 3: Cross multiply
   151,499x = 318,672 × 318,672
4. Step 4: Simplify right side
   151,499x = 101,551,843,584
5. Step 5: Solve for x
   x = 101,551,843,584/151,499
6. Step 6: Final answer
   x = 670,313.62