Finding the Fourth Proportional to 13,144.98, 18,140.06 and 8,429.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,144.98 : 18,140.06 = 8,429.25 : x
2. Step 2: Convert to fraction form
   13,144.98/18,140.06 = 8,429.25/x
3. Step 3: Cross multiply
   13,144.98x = 18,140.06 × 8,429.25
4. Step 4: Simplify right side
   13,144.98x = 152,907,058.61
5. Step 5: Solve for x
   x = 152,907,058.61/13,144.98
6. Step 6: Final answer
   x = 11,632.35