Finding the Third Proportional to 152,979.50 and 331,378

Step by Step Solution

1. Step 1: Write the proportion equation
   152,979.50 : 331,378 = 331,378 : x
2. Step 2: Convert to fraction form
   152,979.50/331,378 = 331,378/x
3. Step 3: Cross multiply
   152,979.50x = 331,378 × 331,378
4. Step 4: Simplify right side
   152,979.50x = 109,811,378,884
5. Step 5: Solve for x
   x = 109,811,378,884/152,979.50
6. Step 6: Final answer
   x = 717,817.61