Finding the Fourth Proportional to 9,439.72, 14,147.34 and 3,886.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.72 : 14,147.34 = 3,886.76 : x
2. Step 2: Convert to fraction form
   9,439.72/14,147.34 = 3,886.76/x
3. Step 3: Cross multiply
   9,439.72x = 14,147.34 × 3,886.76
4. Step 4: Simplify right side
   9,439.72x = 54,987,315.22
5. Step 5: Solve for x
   x = 54,987,315.22/9,439.72
6. Step 6: Final answer
   x = 5,825.10