Finding the Fourth Proportional to 13,222.47, 18,250.07 and 8,498.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,222.47 : 18,250.07 = 8,498.55 : x
2. Step 2: Convert to fraction form
   13,222.47/18,250.07 = 8,498.55/x
3. Step 3: Cross multiply
   13,222.47x = 18,250.07 × 8,498.55
4. Step 4: Simplify right side
   13,222.47x = 155,099,089.91
5. Step 5: Solve for x
   x = 155,099,089.91/13,222.47
6. Step 6: Final answer
   x = 11,729.96