Finding the Fourth Proportional to 19,189.98, 28,683.72 and 16,671.42

Step by Step Solution

1. Step 1: Write the proportion equation
   19,189.98 : 28,683.72 = 16,671.42 : x
2. Step 2: Convert to fraction form
   19,189.98/28,683.72 = 16,671.42/x
3. Step 3: Cross multiply
   19,189.98x = 28,683.72 × 16,671.42
4. Step 4: Simplify right side
   19,189.98x = 478,198,343.28
5. Step 5: Solve for x
   x = 478,198,343.28/19,189.98
6. Step 6: Final answer
   x = 24,919.17