Finding the Third Proportional to 236,858.50 and 518,003.50

Step by Step Solution

1. Step 1: Write the proportion equation
   236,858.50 : 518,003.50 = 518,003.50 : x
2. Step 2: Convert to fraction form
   236,858.50/518,003.50 = 518,003.50/x
3. Step 3: Cross multiply
   236,858.50x = 518,003.50 × 518,003.50
4. Step 4: Simplify right side
   236,858.50x = 268,327,626,012.25
5. Step 5: Solve for x
   x = 268,327,626,012.25/236,858.50
6. Step 6: Final answer
   x = 1,132,860.45