Finding the Fourth Proportional to 2,090.78, 3,135.57 and 841.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.78 : 3,135.57 = 841.37 : x
2. Step 2: Convert to fraction form
   2,090.78/3,135.57 = 841.37/x
3. Step 3: Cross multiply
   2,090.78x = 3,135.57 × 841.37
4. Step 4: Simplify right side
   2,090.78x = 2,638,174.53
5. Step 5: Solve for x
   x = 2,638,174.53/2,090.78
6. Step 6: Final answer
   x = 1,261.81