Finding the Fourth Proportional to 105,058.58, 144,980.53 and 57,311.58

Step by Step Solution

1. Step 1: Write the proportion equation
   105,058.58 : 144,980.53 = 57,311.58 : x
2. Step 2: Convert to fraction form
   105,058.58/144,980.53 = 57,311.58/x
3. Step 3: Cross multiply
   105,058.58x = 144,980.53 × 57,311.58
4. Step 4: Simplify right side
   105,058.58x = 8,309,063,243.54
5. Step 5: Solve for x
   x = 8,309,063,243.54/105,058.58
6. Step 6: Final answer
   x = 79,089.81