Finding the Fourth Proportional to 2,278.16, 3,144.54 and 1,427.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,278.16 : 3,144.54 = 1,427.88 : x
2. Step 2: Convert to fraction form
   2,278.16/3,144.54 = 1,427.88/x
3. Step 3: Cross multiply
   2,278.16x = 3,144.54 × 1,427.88
4. Step 4: Simplify right side
   2,278.16x = 4,490,025.78
5. Step 5: Solve for x
   x = 4,490,025.78/2,278.16
6. Step 6: Final answer
   x = 1,970.90