Finding the Fourth Proportional to 21,533.72, 32,315.34 and 8,386.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,533.72 : 32,315.34 = 8,386.16 : x
2. Step 2: Convert to fraction form
   21,533.72/32,315.34 = 8,386.16/x
3. Step 3: Cross multiply
   21,533.72x = 32,315.34 × 8,386.16
4. Step 4: Simplify right side
   21,533.72x = 271,001,611.69
5. Step 5: Solve for x
   x = 271,001,611.69/21,533.72
6. Step 6: Final answer
   x = 12,584.99