Finding the Fourth Proportional to 2,105.10, 2,902.32 and 1,357.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.10 : 2,902.32 = 1,357.74 : x
2. Step 2: Convert to fraction form
   2,105.10/2,902.32 = 1,357.74/x
3. Step 3: Cross multiply
   2,105.10x = 2,902.32 × 1,357.74
4. Step 4: Simplify right side
   2,105.10x = 3,940,595.96
5. Step 5: Solve for x
   x = 3,940,595.96/2,105.10
6. Step 6: Final answer
   x = 1,871.93