Finding the Fourth Proportional to 2,665.55, 3,998.14 and 1,105.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.55 : 3,998.14 = 1,105.16 : x
2. Step 2: Convert to fraction form
   2,665.55/3,998.14 = 1,105.16/x
3. Step 3: Cross multiply
   2,665.55x = 3,998.14 × 1,105.16
4. Step 4: Simplify right side
   2,665.55x = 4,418,561.65
5. Step 5: Solve for x
   x = 4,418,561.65/2,665.55
6. Step 6: Final answer
   x = 1,657.65