Finding the Fourth Proportional to 13,222.55, 18,248.56 and 8,446.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,222.55 : 18,248.56 = 8,446.86 : x
2. Step 2: Convert to fraction form
   13,222.55/18,248.56 = 8,446.86/x
3. Step 3: Cross multiply
   13,222.55x = 18,248.56 × 8,446.86
4. Step 4: Simplify right side
   13,222.55x = 154,143,010.40
5. Step 5: Solve for x
   x = 154,143,010.40/13,222.55
6. Step 6: Final answer
   x = 11,657.58