Finding the Fourth Proportional to 30,661.05, 42,311.75 and 17,048.55

Step by Step Solution

1. Step 1: Write the proportion equation
   30,661.05 : 42,311.75 = 17,048.55 : x
2. Step 2: Convert to fraction form
   30,661.05/42,311.75 = 17,048.55/x
3. Step 3: Cross multiply
   30,661.05x = 42,311.75 × 17,048.55
4. Step 4: Simplify right side
   30,661.05x = 721,353,900.22
5. Step 5: Solve for x
   x = 721,353,900.22/30,661.05
6. Step 6: Final answer
   x = 23,526.72