Finding the Fourth Proportional to 13,587.72, 18,751.04 and 7,619.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,587.72 : 18,751.04 = 7,619.37 : x
2. Step 2: Convert to fraction form
   13,587.72/18,751.04 = 7,619.37/x
3. Step 3: Cross multiply
   13,587.72x = 18,751.04 × 7,619.37
4. Step 4: Simplify right side
   13,587.72x = 142,871,074.66
5. Step 5: Solve for x
   x = 142,871,074.66/13,587.72
6. Step 6: Final answer
   x = 10,514.72