Finding the Fourth Proportional to 21,677.24, 32,481.83 and 12,907.37

Step by Step Solution

1. Step 1: Write the proportion equation
   21,677.24 : 32,481.83 = 12,907.37 : x
2. Step 2: Convert to fraction form
   21,677.24/32,481.83 = 12,907.37/x
3. Step 3: Cross multiply
   21,677.24x = 32,481.83 × 12,907.37
4. Step 4: Simplify right side
   21,677.24x = 419,254,867.95
5. Step 5: Solve for x
   x = 419,254,867.95/21,677.24
6. Step 6: Final answer
   x = 19,340.79