Finding the Fourth Proportional to 2,141.95, 3,212.89 and 681.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.95 : 3,212.89 = 681.08 : x
2. Step 2: Convert to fraction form
   2,141.95/3,212.89 = 681.08/x
3. Step 3: Cross multiply
   2,141.95x = 3,212.89 × 681.08
4. Step 4: Simplify right side
   2,141.95x = 2,188,231.72
5. Step 5: Solve for x
   x = 2,188,231.72/2,141.95
6. Step 6: Final answer
   x = 1,021.61