Finding the Third Proportional to 311,539 and 445,506.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,539 : 445,506.50 = 445,506.50 : x
2. Step 2: Convert to fraction form
   311,539/445,506.50 = 445,506.50/x
3. Step 3: Cross multiply
   311,539x = 445,506.50 × 445,506.50
4. Step 4: Simplify right side
   311,539x = 198,476,041,542.25
5. Step 5: Solve for x
   x = 198,476,041,542.25/311,539
6. Step 6: Final answer
   x = 637,082.49