Finding the Fourth Proportional to 105,981.30, 146,257.38 and 58,234.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,981.30 : 146,257.38 = 58,234.50 : x
2. Step 2: Convert to fraction form
   105,981.30/146,257.38 = 58,234.50/x
3. Step 3: Cross multiply
   105,981.30x = 146,257.38 × 58,234.50
4. Step 4: Simplify right side
   105,981.30x = 8,517,225,395.61
5. Step 5: Solve for x
   x = 8,517,225,395.61/105,981.30
6. Step 6: Final answer
   x = 80,365.36