Finding the Fourth Proportional to 70,072.72, 105,046.56 and 25,689.11

Step by Step Solution

1. Step 1: Write the proportion equation
   70,072.72 : 105,046.56 = 25,689.11 : x
2. Step 2: Convert to fraction form
   70,072.72/105,046.56 = 25,689.11/x
3. Step 3: Cross multiply
   70,072.72x = 105,046.56 × 25,689.11
4. Step 4: Simplify right side
   70,072.72x = 2,698,552,109.73
5. Step 5: Solve for x
   x = 2,698,552,109.73/70,072.72
6. Step 6: Final answer
   x = 38,510.74