Finding the Fourth Proportional to 13,483.91, 18,608.37 and 7,515.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,483.91 : 18,608.37 = 7,515.57 : x
2. Step 2: Convert to fraction form
   13,483.91/18,608.37 = 7,515.57/x
3. Step 3: Cross multiply
   13,483.91x = 18,608.37 × 7,515.57
4. Step 4: Simplify right side
   13,483.91x = 139,852,507.32
5. Step 5: Solve for x
   x = 139,852,507.32/13,483.91
6. Step 6: Final answer
   x = 10,371.81