Finding the Third Proportional to 5,404.22 and 10,818.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,404.22 : 10,818.56 = 10,818.56 : x
2. Step 2: Convert to fraction form
   5,404.22/10,818.56 = 10,818.56/x
3. Step 3: Cross multiply
   5,404.22x = 10,818.56 × 10,818.56
4. Step 4: Simplify right side
   5,404.22x = 117,041,294.57
5. Step 5: Solve for x
   x = 117,041,294.57/5,404.22
6. Step 6: Final answer
   x = 21,657.39