Finding the Fourth Proportional to 7,776.62, 10,731.76 and 4,239.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,776.62 : 10,731.76 = 4,239.76 : x
2. Step 2: Convert to fraction form
   7,776.62/10,731.76 = 4,239.76/x
3. Step 3: Cross multiply
   7,776.62x = 10,731.76 × 4,239.76
4. Step 4: Simplify right side
   7,776.62x = 45,500,086.78
5. Step 5: Solve for x
   x = 45,500,086.78/7,776.62
6. Step 6: Final answer
   x = 5,850.88