Finding the Fourth Proportional to 105,871.86, 146,103.42 and 58,128.29

Step by Step Solution

1. Step 1: Write the proportion equation
   105,871.86 : 146,103.42 = 58,128.29 : x
2. Step 2: Convert to fraction form
   105,871.86/146,103.42 = 58,128.29/x
3. Step 3: Cross multiply
   105,871.86x = 146,103.42 × 58,128.29
4. Step 4: Simplify right side
   105,871.86x = 8,492,741,237.23
5. Step 5: Solve for x
   x = 8,492,741,237.23/105,871.86
6. Step 6: Final answer
   x = 80,217.17