Finding the Fourth Proportional to 2,141.86, 3,212.76 and 680.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.86 : 3,212.76 = 680.74 : x
2. Step 2: Convert to fraction form
   2,141.86/3,212.76 = 680.74/x
3. Step 3: Cross multiply
   2,141.86x = 3,212.76 × 680.74
4. Step 4: Simplify right side
   2,141.86x = 2,187,054.24
5. Step 5: Solve for x
   x = 2,187,054.24/2,141.86
6. Step 6: Final answer
   x = 1,021.10