Finding the Fourth Proportional to 9,150.72, 12,627.90 and 5,171.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.72 : 12,627.90 = 5,171.84 : x
2. Step 2: Convert to fraction form
   9,150.72/12,627.90 = 5,171.84/x
3. Step 3: Cross multiply
   9,150.72x = 12,627.90 × 5,171.84
4. Step 4: Simplify right side
   9,150.72x = 65,309,478.34
5. Step 5: Solve for x
   x = 65,309,478.34/9,150.72
6. Step 6: Final answer
   x = 7,137.09