Finding the Fourth Proportional to 20,460.41, 28,225.83 and 13,289.82

Step by Step Solution

1. Step 1: Write the proportion equation
   20,460.41 : 28,225.83 = 13,289.82 : x
2. Step 2: Convert to fraction form
   20,460.41/28,225.83 = 13,289.82/x
3. Step 3: Cross multiply
   20,460.41x = 28,225.83 × 13,289.82
4. Step 4: Simplify right side
   20,460.41x = 375,116,200.05
5. Step 5: Solve for x
   x = 375,116,200.05/20,460.41
6. Step 6: Final answer
   x = 18,333.76