Finding the Fourth Proportional to 13,826.54, 19,080.56 and 7,538.91

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.54 : 19,080.56 = 7,538.91 : x
2. Step 2: Convert to fraction form
   13,826.54/19,080.56 = 7,538.91/x
3. Step 3: Cross multiply
   13,826.54x = 19,080.56 × 7,538.91
4. Step 4: Simplify right side
   13,826.54x = 143,846,586.90
5. Step 5: Solve for x
   x = 143,846,586.90/13,826.54
6. Step 6: Final answer
   x = 10,403.66