Finding the Fourth Proportional to 2,145.54, 3,217.63 and 1,105.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.54 : 3,217.63 = 1,105.22 : x
2. Step 2: Convert to fraction form
   2,145.54/3,217.63 = 1,105.22/x
3. Step 3: Cross multiply
   2,145.54x = 3,217.63 × 1,105.22
4. Step 4: Simplify right side
   2,145.54x = 3,556,189.03
5. Step 5: Solve for x
   x = 3,556,189.03/2,145.54
6. Step 6: Final answer
   x = 1,657.48