Finding the Fourth Proportional to 9,150.54, 12,627.61 and 5,172.94

Step by Step Solution

1. Step 1: Write the proportion equation
   9,150.54 : 12,627.61 = 5,172.94 : x
2. Step 2: Convert to fraction form
   9,150.54/12,627.61 = 5,172.94/x
3. Step 3: Cross multiply
   9,150.54x = 12,627.61 × 5,172.94
4. Step 4: Simplify right side
   9,150.54x = 65,321,868.87
5. Step 5: Solve for x
   x = 65,321,868.87/9,150.54
6. Step 6: Final answer
   x = 7,138.58