Finding the Fourth Proportional to 2,153.88, 3,231.77 and 1,671.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.88 : 3,231.77 = 1,671.12 : x
2. Step 2: Convert to fraction form
   2,153.88/3,231.77 = 1,671.12/x
3. Step 3: Cross multiply
   2,153.88x = 3,231.77 × 1,671.12
4. Step 4: Simplify right side
   2,153.88x = 5,400,667.13
5. Step 5: Solve for x
   x = 5,400,667.13/2,153.88
6. Step 6: Final answer
   x = 2,507.41