Finding the Third Proportional to 152,878.50 and 324,258

Step by Step Solution

1. Step 1: Write the proportion equation
   152,878.50 : 324,258 = 324,258 : x
2. Step 2: Convert to fraction form
   152,878.50/324,258 = 324,258/x
3. Step 3: Cross multiply
   152,878.50x = 324,258 × 324,258
4. Step 4: Simplify right side
   152,878.50x = 105,143,250,564
5. Step 5: Solve for x
   x = 105,143,250,564/152,878.50
6. Step 6: Final answer
   x = 687,756.95