Finding the Fourth Proportional to 33,978.33, 50,947.30 and 12,919.91

Step by Step Solution

1. Step 1: Write the proportion equation
   33,978.33 : 50,947.30 = 12,919.91 : x
2. Step 2: Convert to fraction form
   33,978.33/50,947.30 = 12,919.91/x
3. Step 3: Cross multiply
   33,978.33x = 50,947.30 × 12,919.91
4. Step 4: Simplify right side
   33,978.33x = 658,234,530.74
5. Step 5: Solve for x
   x = 658,234,530.74/33,978.33
6. Step 6: Final answer
   x = 19,372.19