Finding the Fourth Proportional to 1,142.52, 1,713.76 and 276.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.52 : 1,713.76 = 276.83 : x
2. Step 2: Convert to fraction form
   1,142.52/1,713.76 = 276.83/x
3. Step 3: Cross multiply
   1,142.52x = 1,713.76 × 276.83
4. Step 4: Simplify right side
   1,142.52x = 474,417.35
5. Step 5: Solve for x
   x = 474,417.35/1,142.52
6. Step 6: Final answer
   x = 415.24