Finding the Fourth Proportional to 12,459.81, 18,598.55 and 10,983.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,459.81 : 18,598.55 = 10,983.57 : x
2. Step 2: Convert to fraction form
   12,459.81/18,598.55 = 10,983.57/x
3. Step 3: Cross multiply
   12,459.81x = 18,598.55 × 10,983.57
4. Step 4: Simplify right side
   12,459.81x = 204,278,503.28
5. Step 5: Solve for x
   x = 204,278,503.28/12,459.81
6. Step 6: Final answer
   x = 16,394.99