Finding the Fourth Proportional to 2,055.90, 2,837.28 and 1,171.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,055.90 : 2,837.28 = 1,171.78 : x
2. Step 2: Convert to fraction form
   2,055.90/2,837.28 = 1,171.78/x
3. Step 3: Cross multiply
   2,055.90x = 2,837.28 × 1,171.78
4. Step 4: Simplify right side
   2,055.90x = 3,324,667.96
5. Step 5: Solve for x
   x = 3,324,667.96/2,055.90
6. Step 6: Final answer
   x = 1,617.14