Finding the Fourth Proportional to 13,826.64, 19,065.69 and 9,342.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.64 : 19,065.69 = 9,342.60 : x
2. Step 2: Convert to fraction form
   13,826.64/19,065.69 = 9,342.60/x
3. Step 3: Cross multiply
   13,826.64x = 19,065.69 × 9,342.60
4. Step 4: Simplify right side
   13,826.64x = 178,123,115.39
5. Step 5: Solve for x
   x = 178,123,115.39/13,826.64
6. Step 6: Final answer
   x = 12,882.60