Finding the Fourth Proportional to 13,433.82, 18,538.77 and 7,768.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,433.82 : 18,538.77 = 7,768.56 : x
2. Step 2: Convert to fraction form
   13,433.82/18,538.77 = 7,768.56/x
3. Step 3: Cross multiply
   13,433.82x = 18,538.77 × 7,768.56
4. Step 4: Simplify right side
   13,433.82x = 144,019,547.07
5. Step 5: Solve for x
   x = 144,019,547.07/13,433.82
6. Step 6: Final answer
   x = 10,720.67