Finding the Fourth Proportional to 12,983.96, 19,387.43 and 10,321.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,983.96 : 19,387.43 = 10,321.49 : x
2. Step 2: Convert to fraction form
   12,983.96/19,387.43 = 10,321.49/x
3. Step 3: Cross multiply
   12,983.96x = 19,387.43 × 10,321.49
4. Step 4: Simplify right side
   12,983.96x = 200,107,258.50
5. Step 5: Solve for x
   x = 200,107,258.50/12,983.96
6. Step 6: Final answer
   x = 15,411.88