Finding the Fourth Proportional to 9,168.72, 12,652.74 and 5,189.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.72 : 12,652.74 = 5,189.76 : x
2. Step 2: Convert to fraction form
   9,168.72/12,652.74 = 5,189.76/x
3. Step 3: Cross multiply
   9,168.72x = 12,652.74 × 5,189.76
4. Step 4: Simplify right side
   9,168.72x = 65,664,683.94
5. Step 5: Solve for x
   x = 65,664,683.94/9,168.72
6. Step 6: Final answer
   x = 7,161.82