Finding the Fourth Proportional to 13,826.70, 19,081.98 and 7,860.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.70 : 19,081.98 = 7,860.24 : x
2. Step 2: Convert to fraction form
   13,826.70/19,081.98 = 7,860.24/x
3. Step 3: Cross multiply
   13,826.70x = 19,081.98 × 7,860.24
4. Step 4: Simplify right side
   13,826.70x = 149,988,942.48
5. Step 5: Solve for x
   x = 149,988,942.48/13,826.70
6. Step 6: Final answer
   x = 10,847.78