Finding the Third Proportional to 250,290.50 and 518,323.50

Step by Step Solution

1. Step 1: Write the proportion equation
   250,290.50 : 518,323.50 = 518,323.50 : x
2. Step 2: Convert to fraction form
   250,290.50/518,323.50 = 518,323.50/x
3. Step 3: Cross multiply
   250,290.50x = 518,323.50 × 518,323.50
4. Step 4: Simplify right side
   250,290.50x = 268,659,250,652.25
5. Step 5: Solve for x
   x = 268,659,250,652.25/250,290.50
6. Step 6: Final answer
   x = 1,073,389.72