Finding the Fourth Proportional to 13,588.70, 18,751.59 and 7,619.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,588.70 : 18,751.59 = 7,619.18 : x
2. Step 2: Convert to fraction form
   13,588.70/18,751.59 = 7,619.18/x
3. Step 3: Cross multiply
   13,588.70x = 18,751.59 × 7,619.18
4. Step 4: Simplify right side
   13,588.70x = 142,871,739.50
5. Step 5: Solve for x
   x = 142,871,739.50/13,588.70
6. Step 6: Final answer
   x = 10,514.01