Finding the Fourth Proportional to 105,991.92, 146,265.90 and 58,245.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,991.92 : 146,265.90 = 58,245.30 : x
2. Step 2: Convert to fraction form
   105,991.92/146,265.90 = 58,245.30/x
3. Step 3: Cross multiply
   105,991.92x = 146,265.90 × 58,245.30
4. Step 4: Simplify right side
   105,991.92x = 8,519,301,225.27
5. Step 5: Solve for x
   x = 8,519,301,225.27/105,991.92
6. Step 6: Final answer
   x = 80,376.89