Finding the Fourth Proportional to 2,789.31, 3,846.69 and 2,157.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,789.31 : 3,846.69 = 2,157.82 : x
2. Step 2: Convert to fraction form
   2,789.31/3,846.69 = 2,157.82/x
3. Step 3: Cross multiply
   2,789.31x = 3,846.69 × 2,157.82
4. Step 4: Simplify right side
   2,789.31x = 8,300,455.00
5. Step 5: Solve for x
   x = 8,300,455.00/2,789.31
6. Step 6: Final answer
   x = 2,975.81