Finding the Fourth Proportional to 20,513.16, 28,317.61 and 12,014.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,513.16 : 28,317.61 = 12,014.10 : x
2. Step 2: Convert to fraction form
   20,513.16/28,317.61 = 12,014.10/x
3. Step 3: Cross multiply
   20,513.16x = 28,317.61 × 12,014.10
4. Step 4: Simplify right side
   20,513.16x = 340,210,598.30
5. Step 5: Solve for x
   x = 340,210,598.30/20,513.16
6. Step 6: Final answer
   x = 16,584.99