Finding the Third Proportional to 207,211.50 and 309,538

Step by Step Solution

1. Step 1: Write the proportion equation
   207,211.50 : 309,538 = 309,538 : x
2. Step 2: Convert to fraction form
   207,211.50/309,538 = 309,538/x
3. Step 3: Cross multiply
   207,211.50x = 309,538 × 309,538
4. Step 4: Simplify right side
   207,211.50x = 95,813,773,444
5. Step 5: Solve for x
   x = 95,813,773,444/207,211.50
6. Step 6: Final answer
   x = 462,396.02