Finding the Fourth Proportional to 13,481.83, 18,605.31 and 7,513.45

Step by Step Solution

1. Step 1: Write the proportion equation
   13,481.83 : 18,605.31 = 7,513.45 : x
2. Step 2: Convert to fraction form
   13,481.83/18,605.31 = 7,513.45/x
3. Step 3: Cross multiply
   13,481.83x = 18,605.31 × 7,513.45
4. Step 4: Simplify right side
   13,481.83x = 139,790,066.42
5. Step 5: Solve for x
   x = 139,790,066.42/13,481.83
6. Step 6: Final answer
   x = 10,368.78