Finding the Fourth Proportional to 13,147.25, 18,145.55 and 7,769.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.25 : 18,145.55 = 7,769.46 : x
2. Step 2: Convert to fraction form
   13,147.25/18,145.55 = 7,769.46/x
3. Step 3: Cross multiply
   13,147.25x = 18,145.55 × 7,769.46
4. Step 4: Simplify right side
   13,147.25x = 140,981,100.62
5. Step 5: Solve for x
   x = 140,981,100.62/13,147.25
6. Step 6: Final answer
   x = 10,723.24