Finding the Fourth Proportional to 105,815.98, 146,021.25 and 58,068.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105,815.98 : 146,021.25 = 58,068.37 : x
2. Step 2: Convert to fraction form
   105,815.98/146,021.25 = 58,068.37/x
3. Step 3: Cross multiply
   105,815.98x = 146,021.25 × 58,068.37
4. Step 4: Simplify right side
   105,815.98x = 8,479,215,972.86
5. Step 5: Solve for x
   x = 8,479,215,972.86/105,815.98
6. Step 6: Final answer
   x = 80,131.72