Finding the Third Proportional to 288,270 and 613,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   288,270 : 613,957.50 = 613,957.50 : x
2. Step 2: Convert to fraction form
   288,270/613,957.50 = 613,957.50/x
3. Step 3: Cross multiply
   288,270x = 613,957.50 × 613,957.50
4. Step 4: Simplify right side
   288,270x = 376,943,811,806.25
5. Step 5: Solve for x
   x = 376,943,811,806.25/288,270
6. Step 6: Final answer
   x = 1,307,606.80