Finding the Fourth Proportional to 30,540.61, 42,145.46 and 16,928.42

Step by Step Solution

1. Step 1: Write the proportion equation
   30,540.61 : 42,145.46 = 16,928.42 : x
2. Step 2: Convert to fraction form
   30,540.61/42,145.46 = 16,928.42/x
3. Step 3: Cross multiply
   30,540.61x = 42,145.46 × 16,928.42
4. Step 4: Simplify right side
   30,540.61x = 713,456,047.97
5. Step 5: Solve for x
   x = 713,456,047.97/30,540.61
6. Step 6: Final answer
   x = 23,360.90