Finding the Fourth Proportional to 105,873.46, 146,107.20 and 58,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   105,873.46 : 146,107.20 = 58,128.82 : x
2. Step 2: Convert to fraction form
   105,873.46/146,107.20 = 58,128.82/x
3. Step 3: Cross multiply
   105,873.46x = 146,107.20 × 58,128.82
4. Step 4: Simplify right side
   105,873.46x = 8,493,039,129.50
5. Step 5: Solve for x
   x = 8,493,039,129.50/105,873.46
6. Step 6: Final answer
   x = 80,218.77