Finding the Third Proportional to 250,821 and 388,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,821 : 388,531.50 = 388,531.50 : x
2. Step 2: Convert to fraction form
   250,821/388,531.50 = 388,531.50/x
3. Step 3: Cross multiply
   250,821x = 388,531.50 × 388,531.50
4. Step 4: Simplify right side
   250,821x = 150,956,726,492.25
5. Step 5: Solve for x
   x = 150,956,726,492.25/250,821
6. Step 6: Final answer
   x = 601,850.43