Finding the Fourth Proportional to 13,131.94, 18,116.28 and 8,881.48

Step by Step Solution

1. Step 1: Write the proportion equation
   13,131.94 : 18,116.28 = 8,881.48 : x
2. Step 2: Convert to fraction form
   13,131.94/18,116.28 = 8,881.48/x
3. Step 3: Cross multiply
   13,131.94x = 18,116.28 × 8,881.48
4. Step 4: Simplify right side
   13,131.94x = 160,899,378.49
5. Step 5: Solve for x
   x = 160,899,378.49/13,131.94
6. Step 6: Final answer
   x = 12,252.52