Finding the Third Proportional to 210,787 and 308,293.50

Step by Step Solution

1. Step 1: Write the proportion equation
   210,787 : 308,293.50 = 308,293.50 : x
2. Step 2: Convert to fraction form
   210,787/308,293.50 = 308,293.50/x
3. Step 3: Cross multiply
   210,787x = 308,293.50 × 308,293.50
4. Step 4: Simplify right side
   210,787x = 95,044,882,142.25
5. Step 5: Solve for x
   x = 95,044,882,142.25/210,787
6. Step 6: Final answer
   x = 450,904.86