Finding the Fourth Proportional to 21,034.56, 31,566.96 and 12,272.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,034.56 : 31,566.96 = 12,272.16 : x
2. Step 2: Convert to fraction form
   21,034.56/31,566.96 = 12,272.16/x
3. Step 3: Cross multiply
   21,034.56x = 31,566.96 × 12,272.16
4. Step 4: Simplify right side
   21,034.56x = 387,394,783.83
5. Step 5: Solve for x
   x = 387,394,783.83/21,034.56
6. Step 6: Final answer
   x = 18,417.06