Finding the Fourth Proportional to 2,431.16, 3,647.16 and 1,392.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.16 : 3,647.16 = 1,392.32 : x
2. Step 2: Convert to fraction form
   2,431.16/3,647.16 = 1,392.32/x
3. Step 3: Cross multiply
   2,431.16x = 3,647.16 × 1,392.32
4. Step 4: Simplify right side
   2,431.16x = 5,078,013.81
5. Step 5: Solve for x
   x = 5,078,013.81/2,431.16
6. Step 6: Final answer
   x = 2,088.72