Finding the Fourth Proportional to 13,855.29, 19,120.42 and 7,887.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,855.29 : 19,120.42 = 7,887.34 : x
2. Step 2: Convert to fraction form
   13,855.29/19,120.42 = 7,887.34/x
3. Step 3: Cross multiply
   13,855.29x = 19,120.42 × 7,887.34
4. Step 4: Simplify right side
   13,855.29x = 150,809,287.24
5. Step 5: Solve for x
   x = 150,809,287.24/13,855.29
6. Step 6: Final answer
   x = 10,884.60