Finding the Fourth Proportional to 45,231.72, 67,838.34 and 17,142.09

Step by Step Solution

1. Step 1: Write the proportion equation
   45,231.72 : 67,838.34 = 17,142.09 : x
2. Step 2: Convert to fraction form
   45,231.72/67,838.34 = 17,142.09/x
3. Step 3: Cross multiply
   45,231.72x = 67,838.34 × 17,142.09
4. Step 4: Simplify right side
   45,231.72x = 1,162,890,929.73
5. Step 5: Solve for x
   x = 1,162,890,929.73/45,231.72
6. Step 6: Final answer
   x = 25,709.63