Finding the Fourth Proportional to 14,300.75, 21,404.55 and 12,936.71

Step by Step Solution

1. Step 1: Write the proportion equation
   14,300.75 : 21,404.55 = 12,936.71 : x
2. Step 2: Convert to fraction form
   14,300.75/21,404.55 = 12,936.71/x
3. Step 3: Cross multiply
   14,300.75x = 21,404.55 × 12,936.71
4. Step 4: Simplify right side
   14,300.75x = 276,904,558.05
5. Step 5: Solve for x
   x = 276,904,558.05/14,300.75
6. Step 6: Final answer
   x = 19,362.94