Finding the Fourth Proportional to 2,431.31, 3,650.60 and 1,392.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.31 : 3,650.60 = 1,392.48 : x
2. Step 2: Convert to fraction form
   2,431.31/3,650.60 = 1,392.48/x
3. Step 3: Cross multiply
   2,431.31x = 3,650.60 × 1,392.48
4. Step 4: Simplify right side
   2,431.31x = 5,083,380.53
5. Step 5: Solve for x
   x = 5,083,380.53/2,431.31
6. Step 6: Final answer
   x = 2,090.80