Finding the Fourth Proportional to 16,839.58, 25,281.24 and 12,946.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,839.58 : 25,281.24 = 12,946.72 : x
2. Step 2: Convert to fraction form
   16,839.58/25,281.24 = 12,946.72/x
3. Step 3: Cross multiply
   16,839.58x = 25,281.24 × 12,946.72
4. Step 4: Simplify right side
   16,839.58x = 327,309,135.53
5. Step 5: Solve for x
   x = 327,309,135.53/16,839.58
6. Step 6: Final answer
   x = 19,436.89