Finding the Fourth Proportional to 2,798.05, 4,196.42 and 1,237.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.05 : 4,196.42 = 1,237.20 : x
2. Step 2: Convert to fraction form
   2,798.05/4,196.42 = 1,237.20/x
3. Step 3: Cross multiply
   2,798.05x = 4,196.42 × 1,237.20
4. Step 4: Simplify right side
   2,798.05x = 5,191,804.64
5. Step 5: Solve for x
   x = 5,191,804.64/2,798.05
6. Step 6: Final answer
   x = 1,855.51