Finding the Fourth Proportional to 9,439.74, 14,147.31 and 3,887.49

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.74 : 14,147.31 = 3,887.49 : x
2. Step 2: Convert to fraction form
   9,439.74/14,147.31 = 3,887.49/x
3. Step 3: Cross multiply
   9,439.74x = 14,147.31 × 3,887.49
4. Step 4: Simplify right side
   9,439.74x = 54,997,571.92
5. Step 5: Solve for x
   x = 54,997,571.92/9,439.74
6. Step 6: Final answer
   x = 5,826.17