Finding the Third Proportional to 322,915.50 and 503,995.50

Step by Step Solution

1. Step 1: Write the proportion equation
   322,915.50 : 503,995.50 = 503,995.50 : x
2. Step 2: Convert to fraction form
   322,915.50/503,995.50 = 503,995.50/x
3. Step 3: Cross multiply
   322,915.50x = 503,995.50 × 503,995.50
4. Step 4: Simplify right side
   322,915.50x = 254,011,464,020.25
5. Step 5: Solve for x
   x = 254,011,464,020.25/322,915.50
6. Step 6: Final answer
   x = 786,618.99