Finding the Fourth Proportional to 12,729.89, 19,094.81 and 7,180.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,729.89 : 19,094.81 = 7,180.72 : x
2. Step 2: Convert to fraction form
   12,729.89/19,094.81 = 7,180.72/x
3. Step 3: Cross multiply
   12,729.89x = 19,094.81 × 7,180.72
4. Step 4: Simplify right side
   12,729.89x = 137,114,400.42
5. Step 5: Solve for x
   x = 137,114,400.42/12,729.89
6. Step 6: Final answer
   x = 10,771.06