Finding the Fourth Proportional to 3,859.73, 5,789.89 and 1,086.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,859.73 : 5,789.89 = 1,086.63 : x
2. Step 2: Convert to fraction form
   3,859.73/5,789.89 = 1,086.63/x
3. Step 3: Cross multiply
   3,859.73x = 5,789.89 × 1,086.63
4. Step 4: Simplify right side
   3,859.73x = 6,291,468.17
5. Step 5: Solve for x
   x = 6,291,468.17/3,859.73
6. Step 6: Final answer
   x = 1,630.03