Finding the Fourth Proportional to 9,216.90, 12,717.81 and 8,749.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,216.90 : 12,717.81 = 8,749.98 : x
2. Step 2: Convert to fraction form
   9,216.90/12,717.81 = 8,749.98/x
3. Step 3: Cross multiply
   9,216.90x = 12,717.81 × 8,749.98
4. Step 4: Simplify right side
   9,216.90x = 111,280,583.14
5. Step 5: Solve for x
   x = 111,280,583.14/9,216.90
6. Step 6: Final answer
   x = 12,073.54