Finding the Third Proportional to 279,498.50 and 603,253.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,498.50 : 603,253.50 = 603,253.50 : x
2. Step 2: Convert to fraction form
   279,498.50/603,253.50 = 603,253.50/x
3. Step 3: Cross multiply
   279,498.50x = 603,253.50 × 603,253.50
4. Step 4: Simplify right side
   279,498.50x = 363,914,785,262.25
5. Step 5: Solve for x
   x = 363,914,785,262.25/279,498.50
6. Step 6: Final answer
   x = 1,302,027.69