Finding the Third Proportional to 279,436.50 and 442,786.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,436.50 : 442,786.50 = 442,786.50 : x
2. Step 2: Convert to fraction form
   279,436.50/442,786.50 = 442,786.50/x
3. Step 3: Cross multiply
   279,436.50x = 442,786.50 × 442,786.50
4. Step 4: Simplify right side
   279,436.50x = 196,059,884,582.25
5. Step 5: Solve for x
   x = 196,059,884,582.25/279,436.50
6. Step 6: Final answer
   x = 701,625.90