Finding the Fourth Proportional to 105,920.12, 146,172.42 and 58,177.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105,920.12 : 146,172.42 = 58,177.94 : x
2. Step 2: Convert to fraction form
   105,920.12/146,172.42 = 58,177.94/x
3. Step 3: Cross multiply
   105,920.12x = 146,172.42 × 58,177.94
4. Step 4: Simplify right side
   105,920.12x = 8,504,010,280.41
5. Step 5: Solve for x
   x = 8,504,010,280.41/105,920.12
6. Step 6: Final answer
   x = 80,287.02