Finding the Fourth Proportional to 21,586.69, 32,360.83 and 8,436.07

Step by Step Solution

1. Step 1: Write the proportion equation
   21,586.69 : 32,360.83 = 8,436.07 : x
2. Step 2: Convert to fraction form
   21,586.69/32,360.83 = 8,436.07/x
3. Step 3: Cross multiply
   21,586.69x = 32,360.83 × 8,436.07
4. Step 4: Simplify right side
   21,586.69x = 272,998,184.96
5. Step 5: Solve for x
   x = 272,998,184.96/21,586.69
6. Step 6: Final answer
   x = 12,646.60