Finding the Third Proportional to 259,228.50 and 402,330

Step by Step Solution

1. Step 1: Write the proportion equation
   259,228.50 : 402,330 = 402,330 : x
2. Step 2: Convert to fraction form
   259,228.50/402,330 = 402,330/x
3. Step 3: Cross multiply
   259,228.50x = 402,330 × 402,330
4. Step 4: Simplify right side
   259,228.50x = 161,869,428,900
5. Step 5: Solve for x
   x = 161,869,428,900/259,228.50
6. Step 6: Final answer
   x = 624,427.60