Finding the Fourth Proportional to 16,959.98, 25,438.35 and 10,382.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,959.98 : 25,438.35 = 10,382.78 : x
2. Step 2: Convert to fraction form
   16,959.98/25,438.35 = 10,382.78/x
3. Step 3: Cross multiply
   16,959.98x = 25,438.35 × 10,382.78
4. Step 4: Simplify right side
   16,959.98x = 264,120,791.61
5. Step 5: Solve for x
   x = 264,120,791.61/16,959.98
6. Step 6: Final answer
   x = 15,573.18