Finding the Fourth Proportional to 21,762.33, 30,029.76 and 12,809.31

Step by Step Solution

1. Step 1: Write the proportion equation
   21,762.33 : 30,029.76 = 12,809.31 : x
2. Step 2: Convert to fraction form
   21,762.33/30,029.76 = 12,809.31/x
3. Step 3: Cross multiply
   21,762.33x = 30,029.76 × 12,809.31
4. Step 4: Simplify right side
   21,762.33x = 384,660,505.07
5. Step 5: Solve for x
   x = 384,660,505.07/21,762.33
6. Step 6: Final answer
   x = 17,675.52