Finding the Fourth Proportional to 10,983.80, 16,472.59 and 5,440.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,983.80 : 16,472.59 = 5,440.43 : x
2. Step 2: Convert to fraction form
   10,983.80/16,472.59 = 5,440.43/x
3. Step 3: Cross multiply
   10,983.80x = 16,472.59 × 5,440.43
4. Step 4: Simplify right side
   10,983.80x = 89,617,972.81
5. Step 5: Solve for x
   x = 89,617,972.81/10,983.80
6. Step 6: Final answer
   x = 8,159.10