Finding the Fourth Proportional to 2,072.37, 3,105.81 and 838.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.37 : 3,105.81 = 838.32 : x
2. Step 2: Convert to fraction form
   2,072.37/3,105.81 = 838.32/x
3. Step 3: Cross multiply
   2,072.37x = 3,105.81 × 838.32
4. Step 4: Simplify right side
   2,072.37x = 2,603,650.99
5. Step 5: Solve for x
   x = 2,603,650.99/2,072.37
6. Step 6: Final answer
   x = 1,256.37