Finding the Fourth Proportional to 16,972.53, 25,435.71 and 12,809.07

Step by Step Solution

1. Step 1: Write the proportion equation
   16,972.53 : 25,435.71 = 12,809.07 : x
2. Step 2: Convert to fraction form
   16,972.53/25,435.71 = 12,809.07/x
3. Step 3: Cross multiply
   16,972.53x = 25,435.71 × 12,809.07
4. Step 4: Simplify right side
   16,972.53x = 325,807,789.89
5. Step 5: Solve for x
   x = 325,807,789.89/16,972.53
6. Step 6: Final answer
   x = 19,196.18