Finding the Fourth Proportional to 5,422.78, 7,483.38 and 2,938.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,422.78 : 7,483.38 = 2,938.78 : x
2. Step 2: Convert to fraction form
   5,422.78/7,483.38 = 2,938.78/x
3. Step 3: Cross multiply
   5,422.78x = 7,483.38 × 2,938.78
4. Step 4: Simplify right side
   5,422.78x = 21,992,007.48
5. Step 5: Solve for x
   x = 21,992,007.48/5,422.78
6. Step 6: Final answer
   x = 4,055.49