Finding the Third Proportional to 152,610 and 331,490

Step by Step Solution

1. Step 1: Write the proportion equation
   152,610 : 331,490 = 331,490 : x
2. Step 2: Convert to fraction form
   152,610/331,490 = 331,490/x
3. Step 3: Cross multiply
   152,610x = 331,490 × 331,490
4. Step 4: Simplify right side
   152,610x = 109,885,620,100
5. Step 5: Solve for x
   x = 109,885,620,100/152,610
6. Step 6: Final answer
   x = 720,042.07