Finding the Fourth Proportional to 30,875.40, 42,608.09 and 16,728.23

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.40 : 42,608.09 = 16,728.23 : x
2. Step 2: Convert to fraction form
   30,875.40/42,608.09 = 16,728.23/x
3. Step 3: Cross multiply
   30,875.40x = 42,608.09 × 16,728.23
4. Step 4: Simplify right side
   30,875.40x = 712,758,077.72
5. Step 5: Solve for x
   x = 712,758,077.72/30,875.40
6. Step 6: Final answer
   x = 23,084.98