Finding the Fourth Proportional to 2,431.09, 3,648.63 and 1,391.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.09 : 3,648.63 = 1,391.59 : x
2. Step 2: Convert to fraction form
   2,431.09/3,648.63 = 1,391.59/x
3. Step 3: Cross multiply
   2,431.09x = 3,648.63 × 1,391.59
4. Step 4: Simplify right side
   2,431.09x = 5,077,397.02
5. Step 5: Solve for x
   x = 5,077,397.02/2,431.09
6. Step 6: Final answer
   x = 2,088.53