Finding the Third Proportional to 5,818.15 and 12,456.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,818.15 : 12,456.42 = 12,456.42 : x
2. Step 2: Convert to fraction form
   5,818.15/12,456.42 = 12,456.42/x
3. Step 3: Cross multiply
   5,818.15x = 12,456.42 × 12,456.42
4. Step 4: Simplify right side
   5,818.15x = 155,162,445.93
5. Step 5: Solve for x
   x = 155,162,445.93/5,818.15
6. Step 6: Final answer
   x = 26,668.70