Finding the Fourth Proportional to 7,022.38, 9,690.94 and 3,878.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.38 : 9,690.94 = 3,878.76 : x
2. Step 2: Convert to fraction form
   7,022.38/9,690.94 = 3,878.76/x
3. Step 3: Cross multiply
   7,022.38x = 9,690.94 × 3,878.76
4. Step 4: Simplify right side
   7,022.38x = 37,588,830.43
5. Step 5: Solve for x
   x = 37,588,830.43/7,022.38
6. Step 6: Final answer
   x = 5,352.72