Finding the Fourth Proportional to 2,811.86, 4,218.69 and 1,351.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,811.86 : 4,218.69 = 1,351.12 : x
2. Step 2: Convert to fraction form
   2,811.86/4,218.69 = 1,351.12/x
3. Step 3: Cross multiply
   2,811.86x = 4,218.69 × 1,351.12
4. Step 4: Simplify right side
   2,811.86x = 5,699,956.43
5. Step 5: Solve for x
   x = 5,699,956.43/2,811.86
6. Step 6: Final answer
   x = 2,027.11