Finding the Fourth Proportional to 7,338.42, 10,128.78 and 4,196.43

Step by Step Solution

1. Step 1: Write the proportion equation
   7,338.42 : 10,128.78 = 4,196.43 : x
2. Step 2: Convert to fraction form
   7,338.42/10,128.78 = 4,196.43/x
3. Step 3: Cross multiply
   7,338.42x = 10,128.78 × 4,196.43
4. Step 4: Simplify right side
   7,338.42x = 42,504,716.26
5. Step 5: Solve for x
   x = 42,504,716.26/7,338.42
6. Step 6: Final answer
   x = 5,792.08