Finding the Fourth Proportional to 9,158.61, 13,728.34 and 4,231.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,158.61 : 13,728.34 = 4,231.48 : x
2. Step 2: Convert to fraction form
   9,158.61/13,728.34 = 4,231.48/x
3. Step 3: Cross multiply
   9,158.61x = 13,728.34 × 4,231.48
4. Step 4: Simplify right side
   9,158.61x = 58,091,202.72
5. Step 5: Solve for x
   x = 58,091,202.72/9,158.61
6. Step 6: Final answer
   x = 6,342.80