Finding the Fourth Proportional to 2,786.68, 4,179.72 and 1,143.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,786.68 : 4,179.72 = 1,143.10 : x
2. Step 2: Convert to fraction form
   2,786.68/4,179.72 = 1,143.10/x
3. Step 3: Cross multiply
   2,786.68x = 4,179.72 × 1,143.10
4. Step 4: Simplify right side
   2,786.68x = 4,777,837.93
5. Step 5: Solve for x
   x = 4,777,837.93/2,786.68
6. Step 6: Final answer
   x = 1,714.53