Finding the Fourth Proportional to 12,081.44, 18,131.28 and 7,404.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,081.44 : 18,131.28 = 7,404.96 : x
2. Step 2: Convert to fraction form
   12,081.44/18,131.28 = 7,404.96/x
3. Step 3: Cross multiply
   12,081.44x = 18,131.28 × 7,404.96
4. Step 4: Simplify right side
   12,081.44x = 134,261,403.15
5. Step 5: Solve for x
   x = 134,261,403.15/12,081.44
6. Step 6: Final answer
   x = 11,113.03