Finding the Fourth Proportional to 2,090.80, 3,130.73 and 1,112.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.80 : 3,130.73 = 1,112.12 : x
2. Step 2: Convert to fraction form
   2,090.80/3,130.73 = 1,112.12/x
3. Step 3: Cross multiply
   2,090.80x = 3,130.73 × 1,112.12
4. Step 4: Simplify right side
   2,090.80x = 3,481,747.45
5. Step 5: Solve for x
   x = 3,481,747.45/2,090.80
6. Step 6: Final answer
   x = 1,665.27