Finding the Fourth Proportional to 2,072.86, 2,859.10 and 1,408.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.86 : 2,859.10 = 1,408.59 : x
2. Step 2: Convert to fraction form
   2,072.86/2,859.10 = 1,408.59/x
3. Step 3: Cross multiply
   2,072.86x = 2,859.10 × 1,408.59
4. Step 4: Simplify right side
   2,072.86x = 4,027,296.15
5. Step 5: Solve for x
   x = 4,027,296.15/2,072.86
6. Step 6: Final answer
   x = 1,942.87