Finding the Third Proportional to 311,899.50 and 635,103

Step by Step Solution

1. Step 1: Write the proportion equation
   311,899.50 : 635,103 = 635,103 : x
2. Step 2: Convert to fraction form
   311,899.50/635,103 = 635,103/x
3. Step 3: Cross multiply
   311,899.50x = 635,103 × 635,103
4. Step 4: Simplify right side
   311,899.50x = 403,355,820,609
5. Step 5: Solve for x
   x = 403,355,820,609/311,899.50
6. Step 6: Final answer
   x = 1,293,223.68