Finding the Third Proportional to 2,811.17 and 4,238.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.17 : 4,238.38 = 4,238.38 : x
2. Step 2: Convert to fraction form
   2,811.17/4,238.38 = 4,238.38/x
3. Step 3: Cross multiply
   2,811.17x = 4,238.38 × 4,238.38
4. Step 4: Simplify right side
   2,811.17x = 17,963,868.17
5. Step 5: Solve for x
   x = 17,963,868.17/2,811.17
6. Step 6: Final answer
   x = 6,390.17