Finding the Fourth Proportional to 2,071.08, 3,105.96 and 838.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,071.08 : 3,105.96 = 838.20 : x
2. Step 2: Convert to fraction form
   2,071.08/3,105.96 = 838.20/x
3. Step 3: Cross multiply
   2,071.08x = 3,105.96 × 838.20
4. Step 4: Simplify right side
   2,071.08x = 2,603,415.67
5. Step 5: Solve for x
   x = 2,603,415.67/2,071.08
6. Step 6: Final answer
   x = 1,257.03