Finding the Fourth Proportional to 7,022.76, 9,691.34 and 3,878.88

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.76 : 9,691.34 = 3,878.88 : x
2. Step 2: Convert to fraction form
   7,022.76/9,691.34 = 3,878.88/x
3. Step 3: Cross multiply
   7,022.76x = 9,691.34 × 3,878.88
4. Step 4: Simplify right side
   7,022.76x = 37,591,544.90
5. Step 5: Solve for x
   x = 37,591,544.90/7,022.76
6. Step 6: Final answer
   x = 5,352.82