Finding the Fourth Proportional to 1,139.82, 1,708.44 and 676.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.82 : 1,708.44 = 676.76 : x
2. Step 2: Convert to fraction form
   1,139.82/1,708.44 = 676.76/x
3. Step 3: Cross multiply
   1,139.82x = 1,708.44 × 676.76
4. Step 4: Simplify right side
   1,139.82x = 1,156,196.58
5. Step 5: Solve for x
   x = 1,156,196.58/1,139.82
6. Step 6: Final answer
   x = 1,014.37