Finding the Fourth Proportional to 2,175.64, 3,002.53 and 1,231.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.64 : 3,002.53 = 1,231.42 : x
2. Step 2: Convert to fraction form
   2,175.64/3,002.53 = 1,231.42/x
3. Step 3: Cross multiply
   2,175.64x = 3,002.53 × 1,231.42
4. Step 4: Simplify right side
   2,175.64x = 3,697,380.75
5. Step 5: Solve for x
   x = 3,697,380.75/2,175.64
6. Step 6: Final answer
   x = 1,699.45