Finding the Third Proportional to 85,308.50 and 199,359.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,308.50 : 199,359.50 = 199,359.50 : x
2. Step 2: Convert to fraction form
   85,308.50/199,359.50 = 199,359.50/x
3. Step 3: Cross multiply
   85,308.50x = 199,359.50 × 199,359.50
4. Step 4: Simplify right side
   85,308.50x = 39,744,210,240.25
5. Step 5: Solve for x
   x = 39,744,210,240.25/85,308.50
6. Step 6: Final answer
   x = 465,888.04