Finding the Third Proportional to 151,413 and 318,520

Step by Step Solution

1. Step 1: Write the proportion equation
   151,413 : 318,520 = 318,520 : x
2. Step 2: Convert to fraction form
   151,413/318,520 = 318,520/x
3. Step 3: Cross multiply
   151,413x = 318,520 × 318,520
4. Step 4: Simplify right side
   151,413x = 101,454,990,400
5. Step 5: Solve for x
   x = 101,454,990,400/151,413
6. Step 6: Final answer
   x = 670,054.69