Finding the Fourth Proportional to 13,518.53, 18,655.61 and 7,550.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,518.53 : 18,655.61 = 7,550.42 : x
2. Step 2: Convert to fraction form
   13,518.53/18,655.61 = 7,550.42/x
3. Step 3: Cross multiply
   13,518.53x = 18,655.61 × 7,550.42
4. Step 4: Simplify right side
   13,518.53x = 140,857,690.86
5. Step 5: Solve for x
   x = 140,857,690.86/13,518.53
6. Step 6: Final answer
   x = 10,419.60