Finding the Fourth Proportional to 3,598.78, 5,397.71 and 1,258.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,598.78 : 5,397.71 = 1,258.69 : x
2. Step 2: Convert to fraction form
   3,598.78/5,397.71 = 1,258.69/x
3. Step 3: Cross multiply
   3,598.78x = 5,397.71 × 1,258.69
4. Step 4: Simplify right side
   3,598.78x = 6,794,026.96
5. Step 5: Solve for x
   x = 6,794,026.96/3,598.78
6. Step 6: Final answer
   x = 1,887.87