Finding the Fourth Proportional to 105,999.12, 146,281.32 and 58,257

Step by Step Solution

1. Step 1: Write the proportion equation
   105,999.12 : 146,281.32 = 58,257 : x
2. Step 2: Convert to fraction form
   105,999.12/146,281.32 = 58,257/x
3. Step 3: Cross multiply
   105,999.12x = 146,281.32 × 58,257
4. Step 4: Simplify right side
   105,999.12x = 8,521,910,859.24
5. Step 5: Solve for x
   x = 8,521,910,859.24/105,999.12
6. Step 6: Final answer
   x = 80,396.05