Finding the Fourth Proportional to 2,278.56, 3,144.72 and 1,347.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.56 : 3,144.72 = 1,347.12 : x
2. Step 2: Convert to fraction form
   2,278.56/3,144.72 = 1,347.12/x
3. Step 3: Cross multiply
   2,278.56x = 3,144.72 × 1,347.12
4. Step 4: Simplify right side
   2,278.56x = 4,236,315.21
5. Step 5: Solve for x
   x = 4,236,315.21/2,278.56
6. Step 6: Final answer
   x = 1,859.21