Finding the Fourth Proportional to 69,761.80, 104,641.76 and 17,171.72

Step by Step Solution

1. Step 1: Write the proportion equation
   69,761.80 : 104,641.76 = 17,171.72 : x
2. Step 2: Convert to fraction form
   69,761.80/104,641.76 = 17,171.72/x
3. Step 3: Cross multiply
   69,761.80x = 104,641.76 × 17,171.72
4. Step 4: Simplify right side
   69,761.80x = 1,796,879,003.03
5. Step 5: Solve for x
   x = 1,796,879,003.03/69,761.80
6. Step 6: Final answer
   x = 25,757.35