Finding the Fourth Proportional to 2,109.07, 3,164.04 and 1,055.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.07 : 3,164.04 = 1,055.43 : x
2. Step 2: Convert to fraction form
   2,109.07/3,164.04 = 1,055.43/x
3. Step 3: Cross multiply
   2,109.07x = 3,164.04 × 1,055.43
4. Step 4: Simplify right side
   2,109.07x = 3,339,401.64
5. Step 5: Solve for x
   x = 3,339,401.64/2,109.07
6. Step 6: Final answer
   x = 1,583.36