Finding the Fourth Proportional to 67,872.28, 93,648.70 and 39,185.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67,872.28 : 93,648.70 = 39,185.72 : x
2. Step 2: Convert to fraction form
   67,872.28/93,648.70 = 39,185.72/x
3. Step 3: Cross multiply
   67,872.28x = 93,648.70 × 39,185.72
4. Step 4: Simplify right side
   67,872.28x = 3,669,691,736.56
5. Step 5: Solve for x
   x = 3,669,691,736.56/67,872.28
6. Step 6: Final answer
   x = 54,067.61