Finding the Fourth Proportional to 105,853.80, 146,079.90 and 58,111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,853.80 : 146,079.90 = 58,111.50 : x
2. Step 2: Convert to fraction form
   105,853.80/146,079.90 = 58,111.50/x
3. Step 3: Cross multiply
   105,853.80x = 146,079.90 × 58,111.50
4. Step 4: Simplify right side
   105,853.80x = 8,488,922,108.85
5. Step 5: Solve for x
   x = 8,488,922,108.85/105,853.80
6. Step 6: Final answer
   x = 80,194.78