Finding the Third Proportional to 274,630.50 and 415,818

Step by Step Solution

1. Step 1: Write the proportion equation
   274,630.50 : 415,818 = 415,818 : x
2. Step 2: Convert to fraction form
   274,630.50/415,818 = 415,818/x
3. Step 3: Cross multiply
   274,630.50x = 415,818 × 415,818
4. Step 4: Simplify right side
   274,630.50x = 172,904,609,124
5. Step 5: Solve for x
   x = 172,904,609,124/274,630.50
6. Step 6: Final answer
   x = 629,589.97