Finding the Fourth Proportional to 105,874.79, 146,107.46 and 58,131.20

Step by Step Solution

1. Step 1: Write the proportion equation
   105,874.79 : 146,107.46 = 58,131.20 : x
2. Step 2: Convert to fraction form
   105,874.79/146,107.46 = 58,131.20/x
3. Step 3: Cross multiply
   105,874.79x = 146,107.46 × 58,131.20
4. Step 4: Simplify right side
   105,874.79x = 8,493,400,957.56
5. Step 5: Solve for x
   x = 8,493,400,957.56/105,874.79
6. Step 6: Final answer
   x = 80,221.19