Finding the Fourth Proportional to 13,488.27, 18,613.40 and 7,519.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.27 : 18,613.40 = 7,519.59 : x
2. Step 2: Convert to fraction form
   13,488.27/18,613.40 = 7,519.59/x
3. Step 3: Cross multiply
   13,488.27x = 18,613.40 × 7,519.59
4. Step 4: Simplify right side
   13,488.27x = 139,965,098.91
5. Step 5: Solve for x
   x = 139,965,098.91/13,488.27
6. Step 6: Final answer
   x = 10,376.80