Finding the Third Proportional to 248,566.50 and 388,845

Step by Step Solution

1. Step 1: Write the proportion equation
   248,566.50 : 388,845 = 388,845 : x
2. Step 2: Convert to fraction form
   248,566.50/388,845 = 388,845/x
3. Step 3: Cross multiply
   248,566.50x = 388,845 × 388,845
4. Step 4: Simplify right side
   248,566.50x = 151,200,434,025
5. Step 5: Solve for x
   x = 151,200,434,025/248,566.50
6. Step 6: Final answer
   x = 608,289.67