Finding the Fourth Proportional to 5,296.18, 7,311.18 and 3,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,296.18 : 7,311.18 = 3,172.72 : x
2. Step 2: Convert to fraction form
   5,296.18/7,311.18 = 3,172.72/x
3. Step 3: Cross multiply
   5,296.18x = 7,311.18 × 3,172.72
4. Step 4: Simplify right side
   5,296.18x = 23,196,327.01
5. Step 5: Solve for x
   x = 23,196,327.01/5,296.18
6. Step 6: Final answer
   x = 4,379.82