Finding the Fourth Proportional to 2,563.31, 3,535.03 and 1,678.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,563.31 : 3,535.03 = 1,678.79 : x
2. Step 2: Convert to fraction form
   2,563.31/3,535.03 = 1,678.79/x
3. Step 3: Cross multiply
   2,563.31x = 3,535.03 × 1,678.79
4. Step 4: Simplify right side
   2,563.31x = 5,934,573.01
5. Step 5: Solve for x
   x = 5,934,573.01/2,563.31
6. Step 6: Final answer
   x = 2,315.20