Finding the Third Proportional to 152,988 and 331,392

Step by Step Solution

1. Step 1: Write the proportion equation
   152,988 : 331,392 = 331,392 : x
2. Step 2: Convert to fraction form
   152,988/331,392 = 331,392/x
3. Step 3: Cross multiply
   152,988x = 331,392 × 331,392
4. Step 4: Simplify right side
   152,988x = 109,820,657,664
5. Step 5: Solve for x
   x = 109,820,657,664/152,988
6. Step 6: Final answer
   x = 717,838.38