Finding the Fourth Proportional to 12,355.74, 18,521.43 and 8,196.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.74 : 18,521.43 = 8,196.96 : x
2. Step 2: Convert to fraction form
   12,355.74/18,521.43 = 8,196.96/x
3. Step 3: Cross multiply
   12,355.74x = 18,521.43 × 8,196.96
4. Step 4: Simplify right side
   12,355.74x = 151,819,420.85
5. Step 5: Solve for x
   x = 151,819,420.85/12,355.74
6. Step 6: Final answer
   x = 12,287.36