Finding the Fourth Proportional to 3,938.39, 5,910.20 and 2,090.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.39 : 5,910.20 = 2,090.82 : x
2. Step 2: Convert to fraction form
   3,938.39/5,910.20 = 2,090.82/x
3. Step 3: Cross multiply
   3,938.39x = 5,910.20 × 2,090.82
4. Step 4: Simplify right side
   3,938.39x = 12,357,153.91
5. Step 5: Solve for x
   x = 12,357,153.91/3,938.39
6. Step 6: Final answer
   x = 3,137.62