Finding the Fourth Proportional to 2,385.92, 3,579.91 and 1,289.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.92 : 3,579.91 = 1,289.00 : x
2. Step 2: Convert to fraction form
   2,385.92/3,579.91 = 1,289.00/x
3. Step 3: Cross multiply
   2,385.92x = 3,579.91 × 1,289.00
4. Step 4: Simplify right side
   2,385.92x = 4,614,509.72
5. Step 5: Solve for x
   x = 4,614,509.72/2,385.92
6. Step 6: Final answer
   x = 1,934.06