Finding the Third Proportional to 285,055.50 and 619,728

Step by Step Solution

1. Step 1: Write the proportion equation
   285,055.50 : 619,728 = 619,728 : x
2. Step 2: Convert to fraction form
   285,055.50/619,728 = 619,728/x
3. Step 3: Cross multiply
   285,055.50x = 619,728 × 619,728
4. Step 4: Simplify right side
   285,055.50x = 384,062,793,984
5. Step 5: Solve for x
   x = 384,062,793,984/285,055.50
6. Step 6: Final answer
   x = 1,347,326.38