Finding the Fourth Proportional to 47,996.83, 71,990.38 and 12,940.03

Step by Step Solution

1. Step 1: Write the proportion equation
   47,996.83 : 71,990.38 = 12,940.03 : x
2. Step 2: Convert to fraction form
   47,996.83/71,990.38 = 12,940.03/x
3. Step 3: Cross multiply
   47,996.83x = 71,990.38 × 12,940.03
4. Step 4: Simplify right side
   47,996.83x = 931,557,464.59
5. Step 5: Solve for x
   x = 931,557,464.59/47,996.83
6. Step 6: Final answer
   x = 19,408.73