Finding the Third Proportional to 85,308 and 199,290

Step by Step Solution

1. Step 1: Write the proportion equation
   85,308 : 199,290 = 199,290 : x
2. Step 2: Convert to fraction form
   85,308/199,290 = 199,290/x
3. Step 3: Cross multiply
   85,308x = 199,290 × 199,290
4. Step 4: Simplify right side
   85,308x = 39,716,504,100
5. Step 5: Solve for x
   x = 39,716,504,100/85,308
6. Step 6: Final answer
   x = 465,566.00