Finding the Third Proportional to 279,461.50 and 395,054

Step by Step Solution

1. Step 1: Write the proportion equation
   279,461.50 : 395,054 = 395,054 : x
2. Step 2: Convert to fraction form
   279,461.50/395,054 = 395,054/x
3. Step 3: Cross multiply
   279,461.50x = 395,054 × 395,054
4. Step 4: Simplify right side
   279,461.50x = 156,067,662,916
5. Step 5: Solve for x
   x = 156,067,662,916/279,461.50
6. Step 6: Final answer
   x = 558,458.55