Finding the Fourth Proportional to 12,160.05, 18,237.48 and 3,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,160.05 : 18,237.48 = 3,840.72 : x
2. Step 2: Convert to fraction form
   12,160.05/18,237.48 = 3,840.72/x
3. Step 3: Cross multiply
   12,160.05x = 18,237.48 × 3,840.72
4. Step 4: Simplify right side
   12,160.05x = 70,045,054.19
5. Step 5: Solve for x
   x = 70,045,054.19/12,160.05
6. Step 6: Final answer
   x = 5,760.26