Finding the Fourth Proportional to 21,686.34, 32,507.58 and 8,533.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,686.34 : 32,507.58 = 8,533.56 : x
2. Step 2: Convert to fraction form
   21,686.34/32,507.58 = 8,533.56/x
3. Step 3: Cross multiply
   21,686.34x = 32,507.58 × 8,533.56
4. Step 4: Simplify right side
   21,686.34x = 277,405,384.38
5. Step 5: Solve for x
   x = 277,405,384.38/21,686.34
6. Step 6: Final answer
   x = 12,791.71