Finding the Fourth Proportional to 2,100.92, 3,149.33 and 1,920.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,100.92 : 3,149.33 = 1,920.51 : x
2. Step 2: Convert to fraction form
   2,100.92/3,149.33 = 1,920.51/x
3. Step 3: Cross multiply
   2,100.92x = 3,149.33 × 1,920.51
4. Step 4: Simplify right side
   2,100.92x = 6,048,310.16
5. Step 5: Solve for x
   x = 6,048,310.16/2,100.92
6. Step 6: Final answer
   x = 2,878.89