Finding the Third Proportional to 21,118.22 and 28,443.66

Step by Step Solution

1. Step 1: Write the proportion equation
   21,118.22 : 28,443.66 = 28,443.66 : x
2. Step 2: Convert to fraction form
   21,118.22/28,443.66 = 28,443.66/x
3. Step 3: Cross multiply
   21,118.22x = 28,443.66 × 28,443.66
4. Step 4: Simplify right side
   21,118.22x = 809,041,580.87
5. Step 5: Solve for x
   x = 809,041,580.87/21,118.22
6. Step 6: Final answer
   x = 38,310.12