Finding the Fourth Proportional to 3,642.18, 5,458.59 and 3,171.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,642.18 : 5,458.59 = 3,171.72 : x
2. Step 2: Convert to fraction form
   3,642.18/5,458.59 = 3,171.72/x
3. Step 3: Cross multiply
   3,642.18x = 5,458.59 × 3,171.72
4. Step 4: Simplify right side
   3,642.18x = 17,313,119.07
5. Step 5: Solve for x
   x = 17,313,119.07/3,642.18
6. Step 6: Final answer
   x = 4,753.50