Finding the Fourth Proportional to 2,090.17, 3,131.37 and 1,813.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.17 : 3,131.37 = 1,813.15 : x
2. Step 2: Convert to fraction form
   2,090.17/3,131.37 = 1,813.15/x
3. Step 3: Cross multiply
   2,090.17x = 3,131.37 × 1,813.15
4. Step 4: Simplify right side
   2,090.17x = 5,677,643.52
5. Step 5: Solve for x
   x = 5,677,643.52/2,090.17
6. Step 6: Final answer
   x = 2,716.35