Finding the Third Proportional to 1,911.38 and 2,811.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,911.38 : 2,811.94 = 2,811.94 : x
2. Step 2: Convert to fraction form
   1,911.38/2,811.94 = 2,811.94/x
3. Step 3: Cross multiply
   1,911.38x = 2,811.94 × 2,811.94
4. Step 4: Simplify right side
   1,911.38x = 7,906,992.50
5. Step 5: Solve for x
   x = 7,906,992.50/1,911.38
6. Step 6: Final answer
   x = 4,136.81