Finding the Third Proportional to 152,603 and 331,478

Step by Step Solution

1. Step 1: Write the proportion equation
   152,603 : 331,478 = 331,478 : x
2. Step 2: Convert to fraction form
   152,603/331,478 = 331,478/x
3. Step 3: Cross multiply
   152,603x = 331,478 × 331,478
4. Step 4: Simplify right side
   152,603x = 109,877,664,484
5. Step 5: Solve for x
   x = 109,877,664,484/152,603
6. Step 6: Final answer
   x = 720,022.96