Finding the Fourth Proportional to 47,340.72, 71,019.72 and 19,638

Step by Step Solution

1. Step 1: Write the proportion equation
   47,340.72 : 71,019.72 = 19,638 : x
2. Step 2: Convert to fraction form
   47,340.72/71,019.72 = 19,638/x
3. Step 3: Cross multiply
   47,340.72x = 71,019.72 × 19,638
4. Step 4: Simplify right side
   47,340.72x = 1,394,685,261.36
5. Step 5: Solve for x
   x = 1,394,685,261.36/47,340.72
6. Step 6: Final answer
   x = 29,460.58