Finding the Fourth Proportional to 105,586.89, 145,709.94 and 57,841.95

Step by Step Solution

1. Step 1: Write the proportion equation
   105,586.89 : 145,709.94 = 57,841.95 : x
2. Step 2: Convert to fraction form
   105,586.89/145,709.94 = 57,841.95/x
3. Step 3: Cross multiply
   105,586.89x = 145,709.94 × 57,841.95
4. Step 4: Simplify right side
   105,586.89x = 8,428,147,063.98
5. Step 5: Solve for x
   x = 8,428,147,063.98/105,586.89
6. Step 6: Final answer
   x = 79,821.91