Finding the Fourth Proportional to 28,470.05, 39,286.71 and 17,137.34

Step by Step Solution

1. Step 1: Write the proportion equation
   28,470.05 : 39,286.71 = 17,137.34 : x
2. Step 2: Convert to fraction form
   28,470.05/39,286.71 = 17,137.34/x
3. Step 3: Cross multiply
   28,470.05x = 39,286.71 × 17,137.34
4. Step 4: Simplify right side
   28,470.05x = 673,269,510.32
5. Step 5: Solve for x
   x = 673,269,510.32/28,470.05
6. Step 6: Final answer
   x = 23,648.35