Finding the Third Proportional to 207,663 and 315,598.50

Step by Step Solution

1. Step 1: Write the proportion equation
   207,663 : 315,598.50 = 315,598.50 : x
2. Step 2: Convert to fraction form
   207,663/315,598.50 = 315,598.50/x
3. Step 3: Cross multiply
   207,663x = 315,598.50 × 315,598.50
4. Step 4: Simplify right side
   207,663x = 99,602,413,202.25
5. Step 5: Solve for x
   x = 99,602,413,202.25/207,663
6. Step 6: Final answer
   x = 479,634.86