Finding the Fourth Proportional to 105,160.14, 145,115.46 and 57,404.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,160.14 : 145,115.46 = 57,404.25 : x
2. Step 2: Convert to fraction form
   105,160.14/145,115.46 = 57,404.25/x
3. Step 3: Cross multiply
   105,160.14x = 145,115.46 × 57,404.25
4. Step 4: Simplify right side
   105,160.14x = 8,330,244,144.71
5. Step 5: Solve for x
   x = 8,330,244,144.71/105,160.14
6. Step 6: Final answer
   x = 79,214.84