Finding the Fourth Proportional to 105,873.29, 146,105.39 and 58,129.70

Step by Step Solution

1. Step 1: Write the proportion equation
   105,873.29 : 146,105.39 = 58,129.70 : x
2. Step 2: Convert to fraction form
   105,873.29/146,105.39 = 58,129.70/x
3. Step 3: Cross multiply
   105,873.29x = 146,105.39 × 58,129.70
4. Step 4: Simplify right side
   105,873.29x = 8,493,061,467.91
5. Step 5: Solve for x
   x = 8,493,061,467.91/105,873.29
6. Step 6: Final answer
   x = 80,219.12