Finding the Fourth Proportional to 105,921.72, 146,171.52 and 58,176

Step by Step Solution

1. Step 1: Write the proportion equation
   105,921.72 : 146,171.52 = 58,176 : x
2. Step 2: Convert to fraction form
   105,921.72/146,171.52 = 58,176/x
3. Step 3: Cross multiply
   105,921.72x = 146,171.52 × 58,176
4. Step 4: Simplify right side
   105,921.72x = 8,503,674,347.52
5. Step 5: Solve for x
   x = 8,503,674,347.52/105,921.72
6. Step 6: Final answer
   x = 80,282.63