Finding the Third Proportional to 279,661 and 395,341.50

Step by Step Solution

1. Step 1: Write the proportion equation
   279,661 : 395,341.50 = 395,341.50 : x
2. Step 2: Convert to fraction form
   279,661/395,341.50 = 395,341.50/x
3. Step 3: Cross multiply
   279,661x = 395,341.50 × 395,341.50
4. Step 4: Simplify right side
   279,661x = 156,294,901,622.25
5. Step 5: Solve for x
   x = 156,294,901,622.25/279,661
6. Step 6: Final answer
   x = 558,872.71