Finding the Fourth Proportional to 5,776.72, 7,966.56 and 3,786.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,776.72 : 7,966.56 = 3,786.55 : x
2. Step 2: Convert to fraction form
   5,776.72/7,966.56 = 3,786.55/x
3. Step 3: Cross multiply
   5,776.72x = 7,966.56 × 3,786.55
4. Step 4: Simplify right side
   5,776.72x = 30,165,777.77
5. Step 5: Solve for x
   x = 30,165,777.77/5,776.72
6. Step 6: Final answer
   x = 5,221.96