Finding the Fourth Proportional to 2,072.78, 3,105.91 and 1,447.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.78 : 3,105.91 = 1,447.46 : x
2. Step 2: Convert to fraction form
   2,072.78/3,105.91 = 1,447.46/x
3. Step 3: Cross multiply
   2,072.78x = 3,105.91 × 1,447.46
4. Step 4: Simplify right side
   2,072.78x = 4,495,680.49
5. Step 5: Solve for x
   x = 4,495,680.49/2,072.78
6. Step 6: Final answer
   x = 2,168.91