Finding the Fourth Proportional to 2,105.89, 2,905.83 and 1,266.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.89 : 2,905.83 = 1,266.42 : x
2. Step 2: Convert to fraction form
   2,105.89/2,905.83 = 1,266.42/x
3. Step 3: Cross multiply
   2,105.89x = 2,905.83 × 1,266.42
4. Step 4: Simplify right side
   2,105.89x = 3,679,994.90
5. Step 5: Solve for x
   x = 3,679,994.90/2,105.89
6. Step 6: Final answer
   x = 1,747.48