Finding the Fourth Proportional to 2,112.88, 3,167.29 and 1,383.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.88 : 3,167.29 = 1,383.07 : x
2. Step 2: Convert to fraction form
   2,112.88/3,167.29 = 1,383.07/x
3. Step 3: Cross multiply
   2,112.88x = 3,167.29 × 1,383.07
4. Step 4: Simplify right side
   2,112.88x = 4,380,583.78
5. Step 5: Solve for x
   x = 4,380,583.78/2,112.88
6. Step 6: Final answer
   x = 2,073.28