Finding the Fourth Proportional to 21,685.72, 32,533.17 and 8,359.06

Step by Step Solution

1. Step 1: Write the proportion equation
   21,685.72 : 32,533.17 = 8,359.06 : x
2. Step 2: Convert to fraction form
   21,685.72/32,533.17 = 8,359.06/x
3. Step 3: Cross multiply
   21,685.72x = 32,533.17 × 8,359.06
4. Step 4: Simplify right side
   21,685.72x = 271,946,720.02
5. Step 5: Solve for x
   x = 271,946,720.02/21,685.72
6. Step 6: Final answer
   x = 12,540.36