Finding the Fourth Proportional to 21,945, 30,284.46 and 13,566.36

Step by Step Solution

1. Step 1: Write the proportion equation
   21,945 : 30,284.46 = 13,566.36 : x
2. Step 2: Convert to fraction form
   21,945/30,284.46 = 13,566.36/x
3. Step 3: Cross multiply
   21,945x = 30,284.46 × 13,566.36
4. Step 4: Simplify right side
   21,945x = 410,849,886.77
5. Step 5: Solve for x
   x = 410,849,886.77/21,945
6. Step 6: Final answer
   x = 18,721.80