Finding the Fourth Proportional to 2,072.91, 3,109.55 and 841.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.91 : 3,109.55 = 841.35 : x
2. Step 2: Convert to fraction form
   2,072.91/3,109.55 = 841.35/x
3. Step 3: Cross multiply
   2,072.91x = 3,109.55 × 841.35
4. Step 4: Simplify right side
   2,072.91x = 2,616,215.69
5. Step 5: Solve for x
   x = 2,616,215.69/2,072.91
6. Step 6: Final answer
   x = 1,262.10