Finding the Fourth Proportional to 2,093, 3,139.54 and 687.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,093 : 3,139.54 = 687.42 : x
2. Step 2: Convert to fraction form
   2,093/3,139.54 = 687.42/x
3. Step 3: Cross multiply
   2,093x = 3,139.54 × 687.42
4. Step 4: Simplify right side
   2,093x = 2,158,182.59
5. Step 5: Solve for x
   x = 2,158,182.59/2,093
6. Step 6: Final answer
   x = 1,031.14