Finding the Fourth Proportional to 13,729.23, 18,945.60 and 7,760.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,729.23 : 18,945.60 = 7,760.54 : x
2. Step 2: Convert to fraction form
   13,729.23/18,945.60 = 7,760.54/x
3. Step 3: Cross multiply
   13,729.23x = 18,945.60 × 7,760.54
4. Step 4: Simplify right side
   13,729.23x = 147,028,104.89
5. Step 5: Solve for x
   x = 147,028,104.89/13,729.23
6. Step 6: Final answer
   x = 10,709.13