Finding the Fourth Proportional to 21,007.45, 31,524.31 and 8,527.47

Step by Step Solution

1. Step 1: Write the proportion equation
   21,007.45 : 31,524.31 = 8,527.47 : x
2. Step 2: Convert to fraction form
   21,007.45/31,524.31 = 8,527.47/x
3. Step 3: Cross multiply
   21,007.45x = 31,524.31 × 8,527.47
4. Step 4: Simplify right side
   21,007.45x = 268,822,607.80
5. Step 5: Solve for x
   x = 268,822,607.80/21,007.45
6. Step 6: Final answer
   x = 12,796.54