Finding the Third Proportional to 249,237 and 386,563.50

Step by Step Solution

1. Step 1: Write the proportion equation
   249,237 : 386,563.50 = 386,563.50 : x
2. Step 2: Convert to fraction form
   249,237/386,563.50 = 386,563.50/x
3. Step 3: Cross multiply
   249,237x = 386,563.50 × 386,563.50
4. Step 4: Simplify right side
   249,237x = 149,431,339,532.25
5. Step 5: Solve for x
   x = 149,431,339,532.25/249,237
6. Step 6: Final answer
   x = 599,555.20