Finding the Third Proportional to 2,111.75 and 2,818.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.75 : 2,818.75 = 2,818.75 : x
2. Step 2: Convert to fraction form
   2,111.75/2,818.75 = 2,818.75/x
3. Step 3: Cross multiply
   2,111.75x = 2,818.75 × 2,818.75
4. Step 4: Simplify right side
   2,111.75x = 7,945,351.56
5. Step 5: Solve for x
   x = 7,945,351.56/2,111.75
6. Step 6: Final answer
   x = 3,762.45