Finding the Fourth Proportional to 30,875.84, 42,608.39 and 16,728.65

Step by Step Solution

1. Step 1: Write the proportion equation
   30,875.84 : 42,608.39 = 16,728.65 : x
2. Step 2: Convert to fraction form
   30,875.84/42,608.39 = 16,728.65/x
3. Step 3: Cross multiply
   30,875.84x = 42,608.39 × 16,728.65
4. Step 4: Simplify right side
   30,875.84x = 712,780,546.69
5. Step 5: Solve for x
   x = 712,780,546.69/30,875.84
6. Step 6: Final answer
   x = 23,085.39