Finding the Fourth Proportional to 105,943.72, 146,203.42 and 57,546.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,943.72 : 146,203.42 = 57,546.60 : x
2. Step 2: Convert to fraction form
   105,943.72/146,203.42 = 57,546.60/x
3. Step 3: Cross multiply
   105,943.72x = 146,203.42 × 57,546.60
4. Step 4: Simplify right side
   105,943.72x = 8,413,509,729.37
5. Step 5: Solve for x
   x = 8,413,509,729.37/105,943.72
6. Step 6: Final answer
   x = 79,414.90