Finding the Fourth Proportional to 13,233.88, 18,264.37 and 7,644.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,233.88 : 18,264.37 = 7,644.88 : x
2. Step 2: Convert to fraction form
   13,233.88/18,264.37 = 7,644.88/x
3. Step 3: Cross multiply
   13,233.88x = 18,264.37 × 7,644.88
4. Step 4: Simplify right side
   13,233.88x = 139,628,825.60
5. Step 5: Solve for x
   x = 139,628,825.60/13,233.88
6. Step 6: Final answer
   x = 10,550.86