Finding the Fourth Proportional to 16,090.47, 22,204.71 and 8,920.89

Step by Step Solution

1. Step 1: Write the proportion equation
   16,090.47 : 22,204.71 = 8,920.89 : x
2. Step 2: Convert to fraction form
   16,090.47/22,204.71 = 8,920.89/x
3. Step 3: Cross multiply
   16,090.47x = 22,204.71 × 8,920.89
4. Step 4: Simplify right side
   16,090.47x = 198,085,775.39
5. Step 5: Solve for x
   x = 198,085,775.39/16,090.47
6. Step 6: Final answer
   x = 12,310.75