Finding the Fourth Proportional to 3,401.82, 5,091.80 and 1,917.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,401.82 : 5,091.80 = 1,917.09 : x
2. Step 2: Convert to fraction form
   3,401.82/5,091.80 = 1,917.09/x
3. Step 3: Cross multiply
   3,401.82x = 5,091.80 × 1,917.09
4. Step 4: Simplify right side
   3,401.82x = 9,761,429.28
5. Step 5: Solve for x
   x = 9,761,429.28/3,401.82
6. Step 6: Final answer
   x = 2,869.47