Finding the Fourth Proportional to 2,158.72, 3,231.02 and 1,170.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.72 : 3,231.02 = 1,170.04 : x
2. Step 2: Convert to fraction form
   2,158.72/3,231.02 = 1,170.04/x
3. Step 3: Cross multiply
   2,158.72x = 3,231.02 × 1,170.04
4. Step 4: Simplify right side
   2,158.72x = 3,780,422.64
5. Step 5: Solve for x
   x = 3,780,422.64/2,158.72
6. Step 6: Final answer
   x = 1,751.23