Finding the Third Proportional to 355,501.50 and 503,020.50

Step by Step Solution

1. Step 1: Write the proportion equation
   355,501.50 : 503,020.50 = 503,020.50 : x
2. Step 2: Convert to fraction form
   355,501.50/503,020.50 = 503,020.50/x
3. Step 3: Cross multiply
   355,501.50x = 503,020.50 × 503,020.50
4. Step 4: Simplify right side
   355,501.50x = 253,029,623,420.25
5. Step 5: Solve for x
   x = 253,029,623,420.25/355,501.50
6. Step 6: Final answer
   x = 711,754.02