Finding the Fourth Proportional to 21,678.24, 32,483.33 and 12,908.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,678.24 : 32,483.33 = 12,908.37 : x
2. Step 2: Convert to fraction form
   21,678.24/32,483.33 = 12,908.37/x
3. Step 3: Cross multiply
   21,678.24x = 32,483.33 × 12,908.37
4. Step 4: Simplify right side
   21,678.24x = 419,306,842.47
5. Step 5: Solve for x
   x = 419,306,842.47/21,678.24
6. Step 6: Final answer
   x = 19,342.29