Finding the Fourth Proportional to 3,758.58, 5,639.31 and 1,418.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,758.58 : 5,639.31 = 1,418.42 : x
2. Step 2: Convert to fraction form
   3,758.58/5,639.31 = 1,418.42/x
3. Step 3: Cross multiply
   3,758.58x = 5,639.31 × 1,418.42
4. Step 4: Simplify right side
   3,758.58x = 7,998,910.09
5. Step 5: Solve for x
   x = 7,998,910.09/3,758.58
6. Step 6: Final answer
   x = 2,128.17