Finding the Fourth Proportional to 7,022.36, 9,690.72 and 3,878.48

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.36 : 9,690.72 = 3,878.48 : x
2. Step 2: Convert to fraction form
   7,022.36/9,690.72 = 3,878.48/x
3. Step 3: Cross multiply
   7,022.36x = 9,690.72 × 3,878.48
4. Step 4: Simplify right side
   7,022.36x = 37,585,263.71
5. Step 5: Solve for x
   x = 37,585,263.71/7,022.36
6. Step 6: Final answer
   x = 5,352.23