Finding the Fourth Proportional to 3,938.60, 5,434.22 and 3,141.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,938.60 : 5,434.22 = 3,141.56 : x
2. Step 2: Convert to fraction form
   3,938.60/5,434.22 = 3,141.56/x
3. Step 3: Cross multiply
   3,938.60x = 5,434.22 × 3,141.56
4. Step 4: Simplify right side
   3,938.60x = 17,071,928.18
5. Step 5: Solve for x
   x = 17,071,928.18/3,938.60
6. Step 6: Final answer
   x = 4,334.52