Finding the Fourth Proportional to 2,141.82, 3,210.39 and 841.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.82 : 3,210.39 = 841.86 : x
2. Step 2: Convert to fraction form
   2,141.82/3,210.39 = 841.86/x
3. Step 3: Cross multiply
   2,141.82x = 3,210.39 × 841.86
4. Step 4: Simplify right side
   2,141.82x = 2,702,698.93
5. Step 5: Solve for x
   x = 2,702,698.93/2,141.82
6. Step 6: Final answer
   x = 1,261.87