Finding the Fourth Proportional to 16,736.45, 25,087.16 and 5,639.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,736.45 : 25,087.16 = 5,639.31 : x
2. Step 2: Convert to fraction form
   16,736.45/25,087.16 = 5,639.31/x
3. Step 3: Cross multiply
   16,736.45x = 25,087.16 × 5,639.31
4. Step 4: Simplify right side
   16,736.45x = 141,474,146.82
5. Step 5: Solve for x
   x = 141,474,146.82/16,736.45
6. Step 6: Final answer
   x = 8,453.06