Finding the Fourth Proportional to 30,871.95, 42,603.59 and 16,725.09

Step by Step Solution

1. Step 1: Write the proportion equation
   30,871.95 : 42,603.59 = 16,725.09 : x
2. Step 2: Convert to fraction form
   30,871.95/42,603.59 = 16,725.09/x
3. Step 3: Cross multiply
   30,871.95x = 42,603.59 × 16,725.09
4. Step 4: Simplify right side
   30,871.95x = 712,548,877.07
5. Step 5: Solve for x
   x = 712,548,877.07/30,871.95
6. Step 6: Final answer
   x = 23,080.79