Finding the Fourth Proportional to 2,789.55, 3,847.64 and 2,439.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.55 : 3,847.64 = 2,439.63 : x
2. Step 2: Convert to fraction form
   2,789.55/3,847.64 = 2,439.63/x
3. Step 3: Cross multiply
   2,789.55x = 3,847.64 × 2,439.63
4. Step 4: Simplify right side
   2,789.55x = 9,386,805.78
5. Step 5: Solve for x
   x = 9,386,805.78/2,789.55
6. Step 6: Final answer
   x = 3,364.99