Finding the Fourth Proportional to 30,875.94, 42,608.82 and 16,728.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.94 : 42,608.82 = 16,728.78 : x
2. Step 2: Convert to fraction form
   30,875.94/42,608.82 = 16,728.78/x
3. Step 3: Cross multiply
   30,875.94x = 42,608.82 × 16,728.78
4. Step 4: Simplify right side
   30,875.94x = 712,793,575.84
5. Step 5: Solve for x
   x = 712,793,575.84/30,875.94
6. Step 6: Final answer
   x = 23,085.73