Finding the Fourth Proportional to 7,022.58, 9,691.29 and 3,878.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,022.58 : 9,691.29 = 3,878.78 : x
2. Step 2: Convert to fraction form
   7,022.58/9,691.29 = 3,878.78/x
3. Step 3: Cross multiply
   7,022.58x = 9,691.29 × 3,878.78
4. Step 4: Simplify right side
   7,022.58x = 37,590,333.37
5. Step 5: Solve for x
   x = 37,590,333.37/7,022.58
6. Step 6: Final answer
   x = 5,352.78