Finding the Fourth Proportional to 30,528.94, 42,128.78 and 17,099.54

Step by Step Solution

1. Step 1: Write the proportion equation
   30,528.94 : 42,128.78 = 17,099.54 : x
2. Step 2: Convert to fraction form
   30,528.94/42,128.78 = 17,099.54/x
3. Step 3: Cross multiply
   30,528.94x = 42,128.78 × 17,099.54
4. Step 4: Simplify right side
   30,528.94x = 720,382,758.76
5. Step 5: Solve for x
   x = 720,382,758.76/30,528.94
6. Step 6: Final answer
   x = 23,596.72