Finding the Fourth Proportional to 30,605.72, 42,235.89 and 17,181.30

Step by Step Solution

1. Step 1: Write the proportion equation
   30,605.72 : 42,235.89 = 17,181.30 : x
2. Step 2: Convert to fraction form
   30,605.72/42,235.89 = 17,181.30/x
3. Step 3: Cross multiply
   30,605.72x = 42,235.89 × 17,181.30
4. Step 4: Simplify right side
   30,605.72x = 725,667,478.38
5. Step 5: Solve for x
   x = 725,667,478.38/30,605.72
6. Step 6: Final answer
   x = 23,710.19