Finding the Third Proportional to 16,821.42 and 26,390.81

Step by Step Solution

1. Step 1: Write the proportion equation
   16,821.42 : 26,390.81 = 26,390.81 : x
2. Step 2: Convert to fraction form
   16,821.42/26,390.81 = 26,390.81/x
3. Step 3: Cross multiply
   16,821.42x = 26,390.81 × 26,390.81
4. Step 4: Simplify right side
   16,821.42x = 696,474,984.41
5. Step 5: Solve for x
   x = 696,474,984.41/16,821.42
6. Step 6: Final answer
   x = 41,404.05