Finding the Fourth Proportional to 2,039.72, 3,057.48 and 1,161.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,039.72 : 3,057.48 = 1,161.08 : x
2. Step 2: Convert to fraction form
   2,039.72/3,057.48 = 1,161.08/x
3. Step 3: Cross multiply
   2,039.72x = 3,057.48 × 1,161.08
4. Step 4: Simplify right side
   2,039.72x = 3,549,978.88
5. Step 5: Solve for x
   x = 3,549,978.88/2,039.72
6. Step 6: Final answer
   x = 1,740.42