Finding the Fourth Proportional to 2,175.65, 3,002.25 and 1,231.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.65 : 3,002.25 = 1,231.54 : x
2. Step 2: Convert to fraction form
   2,175.65/3,002.25 = 1,231.54/x
3. Step 3: Cross multiply
   2,175.65x = 3,002.25 × 1,231.54
4. Step 4: Simplify right side
   2,175.65x = 3,697,372.22
5. Step 5: Solve for x
   x = 3,697,372.22/2,175.65
6. Step 6: Final answer
   x = 1,699.44