Finding the Fourth Proportional to 20,460.69, 30,694.49 and 10,469.77

Step by Step Solution

1. Step 1: Write the proportion equation
   20,460.69 : 30,694.49 = 10,469.77 : x
2. Step 2: Convert to fraction form
   20,460.69/30,694.49 = 10,469.77/x
3. Step 3: Cross multiply
   20,460.69x = 30,694.49 × 10,469.77
4. Step 4: Simplify right side
   20,460.69x = 321,364,196.55
5. Step 5: Solve for x
   x = 321,364,196.55/20,460.69
6. Step 6: Final answer
   x = 15,706.42