Finding the Fourth Proportional to 2,112.16, 2,913.39 and 1,272.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.16 : 2,913.39 = 1,272.29 : x
2. Step 2: Convert to fraction form
   2,112.16/2,913.39 = 1,272.29/x
3. Step 3: Cross multiply
   2,112.16x = 2,913.39 × 1,272.29
4. Step 4: Simplify right side
   2,112.16x = 3,706,676.96
5. Step 5: Solve for x
   x = 3,706,676.96/2,112.16
6. Step 6: Final answer
   x = 1,754.93