Finding the Fourth Proportional to 33,143.70, 49,690.72 and 19,993

Step by Step Solution

1. Step 1: Write the proportion equation
   33,143.70 : 49,690.72 = 19,993 : x
2. Step 2: Convert to fraction form
   33,143.70/49,690.72 = 19,993/x
3. Step 3: Cross multiply
   33,143.70x = 49,690.72 × 19,993
4. Step 4: Simplify right side
   33,143.70x = 993,466,564.96
5. Step 5: Solve for x
   x = 993,466,564.96/33,143.70
6. Step 6: Final answer
   x = 29,974.52