Finding the Third Proportional to 2,607.75 and 5,431.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.75 : 5,431.22 = 5,431.22 : x
2. Step 2: Convert to fraction form
   2,607.75/5,431.22 = 5,431.22/x
3. Step 3: Cross multiply
   2,607.75x = 5,431.22 × 5,431.22
4. Step 4: Simplify right side
   2,607.75x = 29,498,137.11
5. Step 5: Solve for x
   x = 29,498,137.11/2,607.75
6. Step 6: Final answer
   x = 11,311.72