Finding the Fourth Proportional to 2,105.80, 2,906.12 and 1,174.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.80 : 2,906.12 = 1,174.28 : x
2. Step 2: Convert to fraction form
   2,105.80/2,906.12 = 1,174.28/x
3. Step 3: Cross multiply
   2,105.80x = 2,906.12 × 1,174.28
4. Step 4: Simplify right side
   2,105.80x = 3,412,598.59
5. Step 5: Solve for x
   x = 3,412,598.59/2,105.80
6. Step 6: Final answer
   x = 1,620.57