Finding the Fourth Proportional to 5,188.72, 7,161.96 and 3,617.32

Step by Step Solution

1. Step 1: Write the proportion equation
   5,188.72 : 7,161.96 = 3,617.32 : x
2. Step 2: Convert to fraction form
   5,188.72/7,161.96 = 3,617.32/x
3. Step 3: Cross multiply
   5,188.72x = 7,161.96 × 3,617.32
4. Step 4: Simplify right side
   5,188.72x = 25,907,096.81
5. Step 5: Solve for x
   x = 25,907,096.81/5,188.72
6. Step 6: Final answer
   x = 4,992.97