Finding the Fourth Proportional to 3,886.40, 5,818.17 and 2,567.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,886.40 : 5,818.17 = 2,567.72 : x
2. Step 2: Convert to fraction form
   3,886.40/5,818.17 = 2,567.72/x
3. Step 3: Cross multiply
   3,886.40x = 5,818.17 × 2,567.72
4. Step 4: Simplify right side
   3,886.40x = 14,939,431.47
5. Step 5: Solve for x
   x = 14,939,431.47/3,886.40
6. Step 6: Final answer
   x = 3,844.03