Finding the Fourth Proportional to 13,510.83, 18,645.33 and 7,542.39

Step by Step Solution

1. Step 1: Write the proportion equation
   13,510.83 : 18,645.33 = 7,542.39 : x
2. Step 2: Convert to fraction form
   13,510.83/18,645.33 = 7,542.39/x
3. Step 3: Cross multiply
   13,510.83x = 18,645.33 × 7,542.39
4. Step 4: Simplify right side
   13,510.83x = 140,630,350.54
5. Step 5: Solve for x
   x = 140,630,350.54/13,510.83
6. Step 6: Final answer
   x = 10,408.71