Finding the Third Proportional to 320,243.50 and 693,081

Step by Step Solution

1. Step 1: Write the proportion equation
   320,243.50 : 693,081 = 693,081 : x
2. Step 2: Convert to fraction form
   320,243.50/693,081 = 693,081/x
3. Step 3: Cross multiply
   320,243.50x = 693,081 × 693,081
4. Step 4: Simplify right side
   320,243.50x = 480,361,272,561
5. Step 5: Solve for x
   x = 480,361,272,561/320,243.50
6. Step 6: Final answer
   x = 1,499,987.58