Finding the Third Proportional to 152,143.50 and 324,640.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,143.50 : 324,640.50 = 324,640.50 : x
2. Step 2: Convert to fraction form
   152,143.50/324,640.50 = 324,640.50/x
3. Step 3: Cross multiply
   152,143.50x = 324,640.50 × 324,640.50
4. Step 4: Simplify right side
   152,143.50x = 105,391,454,240.25
5. Step 5: Solve for x
   x = 105,391,454,240.25/152,143.50
6. Step 6: Final answer
   x = 692,710.86