Finding the Fourth Proportional to 13,488.59, 18,613.56 and 7,520.14

Step by Step Solution

1. Step 1: Write the proportion equation
   13,488.59 : 18,613.56 = 7,520.14 : x
2. Step 2: Convert to fraction form
   13,488.59/18,613.56 = 7,520.14/x
3. Step 3: Cross multiply
   13,488.59x = 18,613.56 × 7,520.14
4. Step 4: Simplify right side
   13,488.59x = 139,976,628.57
5. Step 5: Solve for x
   x = 139,976,628.57/13,488.59
6. Step 6: Final answer
   x = 10,377.41