Finding the Fourth Proportional to 2,386.83, 3,580.86 and 1,289.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.83 : 3,580.86 = 1,289.69 : x
2. Step 2: Convert to fraction form
   2,386.83/3,580.86 = 1,289.69/x
3. Step 3: Cross multiply
   2,386.83x = 3,580.86 × 1,289.69
4. Step 4: Simplify right side
   2,386.83x = 4,618,192.44
5. Step 5: Solve for x
   x = 4,618,192.44/2,386.83
6. Step 6: Final answer
   x = 1,934.86