Finding the Fourth Proportional to 13,756.12, 18,980.28 and 7,786.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,756.12 : 18,980.28 = 7,786.49 : x
2. Step 2: Convert to fraction form
   13,756.12/18,980.28 = 7,786.49/x
3. Step 3: Cross multiply
   13,756.12x = 18,980.28 × 7,786.49
4. Step 4: Simplify right side
   13,756.12x = 147,789,665.52
5. Step 5: Solve for x
   x = 147,789,665.52/13,756.12
6. Step 6: Final answer
   x = 10,743.56