Finding the Third Proportional to 85,212.50 and 185,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,212.50 : 185,388.50 = 185,388.50 : x
2. Step 2: Convert to fraction form
   85,212.50/185,388.50 = 185,388.50/x
3. Step 3: Cross multiply
   85,212.50x = 185,388.50 × 185,388.50
4. Step 4: Simplify right side
   85,212.50x = 34,368,895,932.25
5. Step 5: Solve for x
   x = 34,368,895,932.25/85,212.50
6. Step 6: Final answer
   x = 403,331.62