Finding the Third Proportional to 249,851 and 356,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,851 : 356,086.50 = 356,086.50 : x
2. Step 2: Convert to fraction form
   249,851/356,086.50 = 356,086.50/x
3. Step 3: Cross multiply
   249,851x = 356,086.50 × 356,086.50
4. Step 4: Simplify right side
   249,851x = 126,797,595,482.25
5. Step 5: Solve for x
   x = 126,797,595,482.25/249,851
6. Step 6: Final answer
   x = 507,492.85