Finding the Fourth Proportional to 3,471.31, 4,789.83 and 2,145.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,471.31 : 4,789.83 = 2,145.88 : x
2. Step 2: Convert to fraction form
   3,471.31/4,789.83 = 2,145.88/x
3. Step 3: Cross multiply
   3,471.31x = 4,789.83 × 2,145.88
4. Step 4: Simplify right side
   3,471.31x = 10,278,400.40
5. Step 5: Solve for x
   x = 10,278,400.40/3,471.31
6. Step 6: Final answer
   x = 2,960.96