Finding the Fourth Proportional to 3,451.80, 5,178.22 and 1,142.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,451.80 : 5,178.22 = 1,142.76 : x
2. Step 2: Convert to fraction form
   3,451.80/5,178.22 = 1,142.76/x
3. Step 3: Cross multiply
   3,451.80x = 5,178.22 × 1,142.76
4. Step 4: Simplify right side
   3,451.80x = 5,917,462.69
5. Step 5: Solve for x
   x = 5,917,462.69/3,451.80
6. Step 6: Final answer
   x = 1,714.31