Finding the Third Proportional to 200,454 and 308,239.50

Step by Step Solution

1. Step 1: Write the proportion equation
   200,454 : 308,239.50 = 308,239.50 : x
2. Step 2: Convert to fraction form
   200,454/308,239.50 = 308,239.50/x
3. Step 3: Cross multiply
   200,454x = 308,239.50 × 308,239.50
4. Step 4: Simplify right side
   200,454x = 95,011,589,360.25
5. Step 5: Solve for x
   x = 95,011,589,360.25/200,454
6. Step 6: Final answer
   x = 473,982.01