Finding the Fourth Proportional to 3,967.82, 5,475.57 and 2,175.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,967.82 : 5,475.57 = 2,175.30 : x
2. Step 2: Convert to fraction form
   3,967.82/5,475.57 = 2,175.30/x
3. Step 3: Cross multiply
   3,967.82x = 5,475.57 × 2,175.30
4. Step 4: Simplify right side
   3,967.82x = 11,911,007.42
5. Step 5: Solve for x
   x = 11,911,007.42/3,967.82
6. Step 6: Final answer
   x = 3,001.91