Finding the Fourth Proportional to 2,115.27, 2,920.10 and 1,408.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.27 : 2,920.10 = 1,408.29 : x
2. Step 2: Convert to fraction form
   2,115.27/2,920.10 = 1,408.29/x
3. Step 3: Cross multiply
   2,115.27x = 2,920.10 × 1,408.29
4. Step 4: Simplify right side
   2,115.27x = 4,112,340.59
5. Step 5: Solve for x
   x = 4,112,340.59/2,115.27
6. Step 6: Final answer
   x = 1,944.12