Finding the Fourth Proportional to 30,872.27, 42,603.89 and 16,725.12

Step by Step Solution

1. Step 1: Write the proportion equation
   30,872.27 : 42,603.89 = 16,725.12 : x
2. Step 2: Convert to fraction form
   30,872.27/42,603.89 = 16,725.12/x
3. Step 3: Cross multiply
   30,872.27x = 42,603.89 × 16,725.12
4. Step 4: Simplify right side
   30,872.27x = 712,555,089.09
5. Step 5: Solve for x
   x = 712,555,089.09/30,872.27
6. Step 6: Final answer
   x = 23,080.75