Finding the Fourth Proportional to 13,544.89, 18,691.56 and 7,881.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,544.89 : 18,691.56 = 7,881.37 : x
2. Step 2: Convert to fraction form
   13,544.89/18,691.56 = 7,881.37/x
3. Step 3: Cross multiply
   13,544.89x = 18,691.56 × 7,881.37
4. Step 4: Simplify right side
   13,544.89x = 147,315,053.51
5. Step 5: Solve for x
   x = 147,315,053.51/13,544.89
6. Step 6: Final answer
   x = 10,876.06