Finding the Fourth Proportional to 15,564.71, 21,481.20 and 8,851.98

Step by Step Solution

1. Step 1: Write the proportion equation
   15,564.71 : 21,481.20 = 8,851.98 : x
2. Step 2: Convert to fraction form
   15,564.71/21,481.20 = 8,851.98/x
3. Step 3: Cross multiply
   15,564.71x = 21,481.20 × 8,851.98
4. Step 4: Simplify right side
   15,564.71x = 190,151,233.33
5. Step 5: Solve for x
   x = 190,151,233.33/15,564.71
6. Step 6: Final answer
   x = 12,216.82