Finding the Third Proportional to 200,616 and 311,636.25

Step by Step Solution

1. Step 1: Write the proportion equation
   200,616 : 311,636.25 = 311,636.25 : x
2. Step 2: Convert to fraction form
   200,616/311,636.25 = 311,636.25/x
3. Step 3: Cross multiply
   200,616x = 311,636.25 × 311,636.25
4. Step 4: Simplify right side
   200,616x = 97,117,152,314.06
5. Step 5: Solve for x
   x = 97,117,152,314.06/200,616
6. Step 6: Final answer
   x = 484,094.75