Finding the Fourth Proportional to 13,826.89, 19,081.56 and 7,778.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.89 : 19,081.56 = 7,778.18 : x
2. Step 2: Convert to fraction form
   13,826.89/19,081.56 = 7,778.18/x
3. Step 3: Cross multiply
   13,826.89x = 19,081.56 × 7,778.18
4. Step 4: Simplify right side
   13,826.89x = 148,419,808.36
5. Step 5: Solve for x
   x = 148,419,808.36/13,826.89
6. Step 6: Final answer
   x = 10,734.14