Finding the Fourth Proportional to 3,647.12, 5,031.72 and 2,388.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,647.12 : 5,031.72 = 2,388.88 : x
2. Step 2: Convert to fraction form
   3,647.12/5,031.72 = 2,388.88/x
3. Step 3: Cross multiply
   3,647.12x = 5,031.72 × 2,388.88
4. Step 4: Simplify right side
   3,647.12x = 12,020,175.27
5. Step 5: Solve for x
   x = 12,020,175.27/3,647.12
6. Step 6: Final answer
   x = 3,295.80