Finding the Fourth Proportional to 13,845.09, 19,105.56 and 7,876.20

Step by Step Solution

1. Step 1: Write the proportion equation
   13,845.09 : 19,105.56 = 7,876.20 : x
2. Step 2: Convert to fraction form
   13,845.09/19,105.56 = 7,876.20/x
3. Step 3: Cross multiply
   13,845.09x = 19,105.56 × 7,876.20
4. Step 4: Simplify right side
   13,845.09x = 150,479,211.67
5. Step 5: Solve for x
   x = 150,479,211.67/13,845.09
6. Step 6: Final answer
   x = 10,868.78