Finding the Fourth Proportional to 13,519.09, 18,655.54 and 7,551.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,519.09 : 18,655.54 = 7,551.15 : x
2. Step 2: Convert to fraction form
   13,519.09/18,655.54 = 7,551.15/x
3. Step 3: Cross multiply
   13,519.09x = 18,655.54 × 7,551.15
4. Step 4: Simplify right side
   13,519.09x = 140,870,780.87
5. Step 5: Solve for x
   x = 140,870,780.87/13,519.09
6. Step 6: Final answer
   x = 10,420.14