Finding the Fourth Proportional to 2,141.19, 3,212.42 and 680.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.19 : 3,212.42 = 680.31 : x
2. Step 2: Convert to fraction form
   2,141.19/3,212.42 = 680.31/x
3. Step 3: Cross multiply
   2,141.19x = 3,212.42 × 680.31
4. Step 4: Simplify right side
   2,141.19x = 2,185,438.05
5. Step 5: Solve for x
   x = 2,185,438.05/2,141.19
6. Step 6: Final answer
   x = 1,020.67