Finding the Fourth Proportional to 9,144.54, 12,618.72 and 5,166

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.54 : 12,618.72 = 5,166 : x
2. Step 2: Convert to fraction form
   9,144.54/12,618.72 = 5,166/x
3. Step 3: Cross multiply
   9,144.54x = 12,618.72 × 5,166
4. Step 4: Simplify right side
   9,144.54x = 65,188,307.52
5. Step 5: Solve for x
   x = 65,188,307.52/9,144.54
6. Step 6: Final answer
   x = 7,128.66