Finding the Fourth Proportional to 1,667.20, 2,495.56 and 1,144.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.20 : 2,495.56 = 1,144.15 : x
2. Step 2: Convert to fraction form
   1,667.20/2,495.56 = 1,144.15/x
3. Step 3: Cross multiply
   1,667.20x = 2,495.56 × 1,144.15
4. Step 4: Simplify right side
   1,667.20x = 2,855,294.97
5. Step 5: Solve for x
   x = 2,855,294.97/1,667.20
6. Step 6: Final answer
   x = 1,712.63