Finding the Fourth Proportional to 13,826.79, 19,081.04 and 7,539.12

Step by Step Solution

1. Step 1: Write the proportion equation
   13,826.79 : 19,081.04 = 7,539.12 : x
2. Step 2: Convert to fraction form
   13,826.79/19,081.04 = 7,539.12/x
3. Step 3: Cross multiply
   13,826.79x = 19,081.04 × 7,539.12
4. Step 4: Simplify right side
   13,826.79x = 143,854,212.59
5. Step 5: Solve for x
   x = 143,854,212.59/13,826.79
6. Step 6: Final answer
   x = 10,404.02