Finding the Fourth Proportional to 2,105.20, 3,164.10 and 1,742.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105.20 : 3,164.10 = 1,742.32 : x
2. Step 2: Convert to fraction form
   2,105.20/3,164.10 = 1,742.32/x
3. Step 3: Cross multiply
   2,105.20x = 3,164.10 × 1,742.32
4. Step 4: Simplify right side
   2,105.20x = 5,512,874.71
5. Step 5: Solve for x
   x = 5,512,874.71/2,105.20
6. Step 6: Final answer
   x = 2,618.69