Finding the Fourth Proportional to 7,768.18, 10,719.76 and 4,231.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,768.18 : 10,719.76 = 4,231.42 : x
2. Step 2: Convert to fraction form
   7,768.18/10,719.76 = 4,231.42/x
3. Step 3: Cross multiply
   7,768.18x = 10,719.76 × 4,231.42
4. Step 4: Simplify right side
   7,768.18x = 45,359,806.86
5. Step 5: Solve for x
   x = 45,359,806.86/7,768.18
6. Step 6: Final answer
   x = 5,839.18