Finding the Fourth Proportional to 2,106.42, 3,138.61 and 2,012.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.42 : 3,138.61 = 2,012.11 : x
2. Step 2: Convert to fraction form
   2,106.42/3,138.61 = 2,012.11/x
3. Step 3: Cross multiply
   2,106.42x = 3,138.61 × 2,012.11
4. Step 4: Simplify right side
   2,106.42x = 6,315,215.69
5. Step 5: Solve for x
   x = 6,315,215.69/2,106.42
6. Step 6: Final answer
   x = 2,998.08