Finding the Fourth Proportional to 12,014.28, 18,025.59 and 10,644.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,014.28 : 18,025.59 = 10,644.69 : x
2. Step 2: Convert to fraction form
   12,014.28/18,025.59 = 10,644.69/x
3. Step 3: Cross multiply
   12,014.28x = 18,025.59 × 10,644.69
4. Step 4: Simplify right side
   12,014.28x = 191,876,817.62
5. Step 5: Solve for x
   x = 191,876,817.62/12,014.28
6. Step 6: Final answer
   x = 15,970.73