Finding the Fourth Proportional to 105,055.58, 144,974.27 and 57,310.61

Step by Step Solution

1. Step 1: Write the proportion equation
   105,055.58 : 144,974.27 = 57,310.61 : x
2. Step 2: Convert to fraction form
   105,055.58/144,974.27 = 57,310.61/x
3. Step 3: Cross multiply
   105,055.58x = 144,974.27 × 57,310.61
4. Step 4: Simplify right side
   105,055.58x = 8,308,563,266.41
5. Step 5: Solve for x
   x = 8,308,563,266.41/105,055.58
6. Step 6: Final answer
   x = 79,087.31