Finding the Fourth Proportional to 1,879.40, 2,593.42 and 1,172.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,879.40 : 2,593.42 = 1,172.05 : x
2. Step 2: Convert to fraction form
   1,879.40/2,593.42 = 1,172.05/x
3. Step 3: Cross multiply
   1,879.40x = 2,593.42 × 1,172.05
4. Step 4: Simplify right side
   1,879.40x = 3,039,608.50
5. Step 5: Solve for x
   x = 3,039,608.50/1,879.40
6. Step 6: Final answer
   x = 1,617.33