Finding the Fourth Proportional to 2,105.79, 2,905.86 and 1,266

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.79 : 2,905.86 = 1,266 : x
2. Step 2: Convert to fraction form
   2,105.79/2,905.86 = 1,266/x
3. Step 3: Cross multiply
   2,105.79x = 2,905.86 × 1,266
4. Step 4: Simplify right side
   2,105.79x = 3,678,818.76
5. Step 5: Solve for x
   x = 3,678,818.76/2,105.79
6. Step 6: Final answer
   x = 1,747.00