Finding the Fourth Proportional to 2,070.98, 3,106.28 and 838.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,070.98 : 3,106.28 = 838.04 : x
2. Step 2: Convert to fraction form
   2,070.98/3,106.28 = 838.04/x
3. Step 3: Cross multiply
   2,070.98x = 3,106.28 × 838.04
4. Step 4: Simplify right side
   2,070.98x = 2,603,186.89
5. Step 5: Solve for x
   x = 2,603,186.89/2,070.98
6. Step 6: Final answer
   x = 1,256.98