Finding the Fourth Proportional to 2,798.90, 4,196.82 and 1,390.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.90 : 4,196.82 = 1,390.22 : x
2. Step 2: Convert to fraction form
   2,798.90/4,196.82 = 1,390.22/x
3. Step 3: Cross multiply
   2,798.90x = 4,196.82 × 1,390.22
4. Step 4: Simplify right side
   2,798.90x = 5,834,508.33
5. Step 5: Solve for x
   x = 5,834,508.33/2,798.90
6. Step 6: Final answer
   x = 2,084.58