Finding the Third Proportional to 279,453 and 395,041.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,453 : 395,041.50 = 395,041.50 : x
2. Step 2: Convert to fraction form
   279,453/395,041.50 = 395,041.50/x
3. Step 3: Cross multiply
   279,453x = 395,041.50 × 395,041.50
4. Step 4: Simplify right side
   279,453x = 156,057,786,722.25
5. Step 5: Solve for x
   x = 156,057,786,722.25/279,453
6. Step 6: Final answer
   x = 558,440.19