Finding the Fourth Proportional to 2,090.34, 3,131.55 and 1,394.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,090.34 : 3,131.55 = 1,394.91 : x
2. Step 2: Convert to fraction form
   2,090.34/3,131.55 = 1,394.91/x
3. Step 3: Cross multiply
   2,090.34x = 3,131.55 × 1,394.91
4. Step 4: Simplify right side
   2,090.34x = 4,368,230.41
5. Step 5: Solve for x
   x = 4,368,230.41/2,090.34
6. Step 6: Final answer
   x = 2,089.72