Finding the Fourth Proportional to 105,685.06, 145,843.98 and 57,938.41

Step by Step Solution

1. Step 1: Write the proportion equation
   105,685.06 : 145,843.98 = 57,938.41 : x
2. Step 2: Convert to fraction form
   105,685.06/145,843.98 = 57,938.41/x
3. Step 3: Cross multiply
   105,685.06x = 145,843.98 × 57,938.41
4. Step 4: Simplify right side
   105,685.06x = 8,449,968,309.27
5. Step 5: Solve for x
   x = 8,449,968,309.27/105,685.06
6. Step 6: Final answer
   x = 79,954.24