Finding the Fourth Proportional to 5,776.48, 7,972.28 and 3,788.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,776.48 : 7,972.28 = 3,788.72 : x
2. Step 2: Convert to fraction form
   5,776.48/7,972.28 = 3,788.72/x
3. Step 3: Cross multiply
   5,776.48x = 7,972.28 × 3,788.72
4. Step 4: Simplify right side
   5,776.48x = 30,204,736.68
5. Step 5: Solve for x
   x = 30,204,736.68/5,776.48
6. Step 6: Final answer
   x = 5,228.92