Finding the Third Proportional to 279,477 and 395,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,477 : 395,077.50 = 395,077.50 : x
2. Step 2: Convert to fraction form
   279,477/395,077.50 = 395,077.50/x
3. Step 3: Cross multiply
   279,477x = 395,077.50 × 395,077.50
4. Step 4: Simplify right side
   279,477x = 156,086,231,006.25
5. Step 5: Solve for x
   x = 156,086,231,006.25/279,477
6. Step 6: Final answer
   x = 558,494.01