Finding the Fourth Proportional to 105,114.54, 145,058.58 and 57,369

Step by Step Solution

1. Step 1: Write the proportion equation
   105,114.54 : 145,058.58 = 57,369 : x
2. Step 2: Convert to fraction form
   105,114.54/145,058.58 = 57,369/x
3. Step 3: Cross multiply
   105,114.54x = 145,058.58 × 57,369
4. Step 4: Simplify right side
   105,114.54x = 8,321,865,676.02
5. Step 5: Solve for x
   x = 8,321,865,676.02/105,114.54
6. Step 6: Final answer
   x = 79,169.50