Finding the Third Proportional to 152,987 and 331,390

Step by Step Solution

1. Step 1: Write the proportion equation
   152,987 : 331,390 = 331,390 : x
2. Step 2: Convert to fraction form
   152,987/331,390 = 331,390/x
3. Step 3: Cross multiply
   152,987x = 331,390 × 331,390
4. Step 4: Simplify right side
   152,987x = 109,819,332,100
5. Step 5: Solve for x
   x = 109,819,332,100/152,987
6. Step 6: Final answer
   x = 717,834.40