Finding the Fourth Proportional to 9,018.72, 12,439.58 and 8,275.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.72 : 12,439.58 = 8,275.14 : x
2. Step 2: Convert to fraction form
   9,018.72/12,439.58 = 8,275.14/x
3. Step 3: Cross multiply
   9,018.72x = 12,439.58 × 8,275.14
4. Step 4: Simplify right side
   9,018.72x = 102,939,224.67
5. Step 5: Solve for x
   x = 102,939,224.67/9,018.72
6. Step 6: Final answer
   x = 11,413.95