Finding the Fourth Proportional to 13,853.89, 19,117.65 and 7,885.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,853.89 : 19,117.65 = 7,885.54 : x
2. Step 2: Convert to fraction form
   13,853.89/19,117.65 = 7,885.54/x
3. Step 3: Cross multiply
   13,853.89x = 19,117.65 × 7,885.54
4. Step 4: Simplify right side
   13,853.89x = 150,752,993.78
5. Step 5: Solve for x
   x = 150,752,993.78/13,853.89
6. Step 6: Final answer
   x = 10,881.64