Finding the Third Proportional to 320,087.50 and 699,233

Step by Step Solution

1. Step 1: Write the proportion equation
   320,087.50 : 699,233 = 699,233 : x
2. Step 2: Convert to fraction form
   320,087.50/699,233 = 699,233/x
3. Step 3: Cross multiply
   320,087.50x = 699,233 × 699,233
4. Step 4: Simplify right side
   320,087.50x = 488,926,788,289
5. Step 5: Solve for x
   x = 488,926,788,289/320,087.50
6. Step 6: Final answer
   x = 1,527,478.54