Finding the Fourth Proportional to 3,886.82, 5,828.73 and 1,289.06

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.82 : 5,828.73 = 1,289.06 : x
2. Step 2: Convert to fraction form
   3,886.82/5,828.73 = 1,289.06/x
3. Step 3: Cross multiply
   3,886.82x = 5,828.73 × 1,289.06
4. Step 4: Simplify right side
   3,886.82x = 7,513,582.69
5. Step 5: Solve for x
   x = 7,513,582.69/3,886.82
6. Step 6: Final answer
   x = 1,933.09