Finding the Fourth Proportional to 2,789.43, 3,846.40 and 2,118.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.43 : 3,846.40 = 2,118.47 : x
2. Step 2: Convert to fraction form
   2,789.43/3,846.40 = 2,118.47/x
3. Step 3: Cross multiply
   2,789.43x = 3,846.40 × 2,118.47
4. Step 4: Simplify right side
   2,789.43x = 8,148,478.69
5. Step 5: Solve for x
   x = 8,148,478.69/2,789.43
6. Step 6: Final answer
   x = 2,921.20