Finding the Fourth Proportional to 16,947.98, 25,420.35 and 10,370.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,947.98 : 25,420.35 = 10,370.78 : x
2. Step 2: Convert to fraction form
   16,947.98/25,420.35 = 10,370.78/x
3. Step 3: Cross multiply
   16,947.98x = 25,420.35 × 10,370.78
4. Step 4: Simplify right side
   16,947.98x = 263,628,857.37
5. Step 5: Solve for x
   x = 263,628,857.37/16,947.98
6. Step 6: Final answer
   x = 15,555.18