Finding the Fourth Proportional to 21,184.56, 31,742.28 and 10,782

Step by Step Solution

1. Step 1: Write the proportion equation
   21,184.56 : 31,742.28 = 10,782 : x
2. Step 2: Convert to fraction form
   21,184.56/31,742.28 = 10,782/x
3. Step 3: Cross multiply
   21,184.56x = 31,742.28 × 10,782
4. Step 4: Simplify right side
   21,184.56x = 342,245,262.96
5. Step 5: Solve for x
   x = 342,245,262.96/21,184.56
6. Step 6: Final answer
   x = 16,155.41