Finding the Third Proportional to 202,942.50 and 321,336

Step by Step Solution

1. Step 1: Write the proportion equation
   202,942.50 : 321,336 = 321,336 : x
2. Step 2: Convert to fraction form
   202,942.50/321,336 = 321,336/x
3. Step 3: Cross multiply
   202,942.50x = 321,336 × 321,336
4. Step 4: Simplify right side
   202,942.50x = 103,256,824,896
5. Step 5: Solve for x
   x = 103,256,824,896/202,942.50
6. Step 6: Final answer
   x = 508,798.43