Finding the Fourth Proportional to 30,485.28, 42,071.94 and 17,057.88

Step by Step Solution

1. Step 1: Write the proportion equation
   30,485.28 : 42,071.94 = 17,057.88 : x
2. Step 2: Convert to fraction form
   30,485.28/42,071.94 = 17,057.88/x
3. Step 3: Cross multiply
   30,485.28x = 42,071.94 × 17,057.88
4. Step 4: Simplify right side
   30,485.28x = 717,658,103.89
5. Step 5: Solve for x
   x = 717,658,103.89/30,485.28
6. Step 6: Final answer
   x = 23,541.14