Finding the Fourth Proportional to 172,085.57, 258,164.79 and 53,765.82

Step by Step Solution

1. Step 1: Write the proportion equation
   172,085.57 : 258,164.79 = 53,765.82 : x
2. Step 2: Convert to fraction form
   172,085.57/258,164.79 = 53,765.82/x
3. Step 3: Cross multiply
   172,085.57x = 258,164.79 × 53,765.82
4. Step 4: Simplify right side
   172,085.57x = 13,880,441,629.48
5. Step 5: Solve for x
   x = 13,880,441,629.48/172,085.57
6. Step 6: Final answer
   x = 80,660.12