Finding the Fourth Proportional to 16,641, 24,978.60 and 12,983.22

Step by Step Solution

1. Step 1: Write the proportion equation
   16,641 : 24,978.60 = 12,983.22 : x
2. Step 2: Convert to fraction form
   16,641/24,978.60 = 12,983.22/x
3. Step 3: Cross multiply
   16,641x = 24,978.60 × 12,983.22
4. Step 4: Simplify right side
   16,641x = 324,302,659.09
5. Step 5: Solve for x
   x = 324,302,659.09/16,641
6. Step 6: Final answer
   x = 19,488.17