Finding the Fourth Proportional to 7,768.51, 10,720.56 and 4,231.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,768.51 : 10,720.56 = 4,231.69 : x
2. Step 2: Convert to fraction form
   7,768.51/10,720.56 = 4,231.69/x
3. Step 3: Cross multiply
   7,768.51x = 10,720.56 × 4,231.69
4. Step 4: Simplify right side
   7,768.51x = 45,366,086.55
5. Step 5: Solve for x
   x = 45,366,086.55/7,768.51
6. Step 6: Final answer
   x = 5,839.74