Finding the Fourth Proportional to 13,855.89, 19,120.41 and 7,887.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,855.89 : 19,120.41 = 7,887.54 : x
2. Step 2: Convert to fraction form
   13,855.89/19,120.41 = 7,887.54/x
3. Step 3: Cross multiply
   13,855.89x = 19,120.41 × 7,887.54
4. Step 4: Simplify right side
   13,855.89x = 150,812,998.69
5. Step 5: Solve for x
   x = 150,812,998.69/13,855.89
6. Step 6: Final answer
   x = 10,884.40