Finding the Fourth Proportional to 16,820.17, 23,043.74 and 16,189.57

Step by Step Solution

1. Step 1: Write the proportion equation
   16,820.17 : 23,043.74 = 16,189.57 : x
2. Step 2: Convert to fraction form
   16,820.17/23,043.74 = 16,189.57/x
3. Step 3: Cross multiply
   16,820.17x = 23,043.74 × 16,189.57
4. Step 4: Simplify right side
   16,820.17x = 373,068,241.79
5. Step 5: Solve for x
   x = 373,068,241.79/16,820.17
6. Step 6: Final answer
   x = 22,179.81