Finding the Fourth Proportional to 105,055.14, 144,978.15 and 57,310.26

Step by Step Solution

1. Step 1: Write the proportion equation
   105,055.14 : 144,978.15 = 57,310.26 : x
2. Step 2: Convert to fraction form
   105,055.14/144,978.15 = 57,310.26/x
3. Step 3: Cross multiply
   105,055.14x = 144,978.15 × 57,310.26
4. Step 4: Simplify right side
   105,055.14x = 8,308,735,470.82
5. Step 5: Solve for x
   x = 8,308,735,470.82/105,055.14
6. Step 6: Final answer
   x = 79,089.28