Finding the Third Proportional to 2,791.13 and 4,222.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,791.13 : 4,222.69 = 4,222.69 : x
2. Step 2: Convert to fraction form
   2,791.13/4,222.69 = 4,222.69/x
3. Step 3: Cross multiply
   2,791.13x = 4,222.69 × 4,222.69
4. Step 4: Simplify right side
   2,791.13x = 17,831,089.72
5. Step 5: Solve for x
   x = 17,831,089.72/2,791.13
6. Step 6: Final answer
   x = 6,388.50