Finding the Fourth Proportional to 9,439.31, 14,160.67 and 3,889.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,439.31 : 14,160.67 = 3,889.57 : x
2. Step 2: Convert to fraction form
   9,439.31/14,160.67 = 3,889.57/x
3. Step 3: Cross multiply
   9,439.31x = 14,160.67 × 3,889.57
4. Step 4: Simplify right side
   9,439.31x = 55,078,891.53
5. Step 5: Solve for x
   x = 55,078,891.53/9,439.31
6. Step 6: Final answer
   x = 5,835.05