Finding the Fourth Proportional to 105,058.59, 144,978.42 and 57,313.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,058.59 : 144,978.42 = 57,313.62 : x
2. Step 2: Convert to fraction form
   105,058.59/144,978.42 = 57,313.62/x
3. Step 3: Cross multiply
   105,058.59x = 144,978.42 × 57,313.62
4. Step 4: Simplify right side
   105,058.59x = 8,309,238,072.08
5. Step 5: Solve for x
   x = 8,309,238,072.08/105,058.59
6. Step 6: Final answer
   x = 79,091.47