Finding the Fourth Proportional to 105,151.07, 145,107.73 and 57,404.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,151.07 : 145,107.73 = 57,404.42 : x
2. Step 2: Convert to fraction form
   105,151.07/145,107.73 = 57,404.42/x
3. Step 3: Cross multiply
   105,151.07x = 145,107.73 × 57,404.42
4. Step 4: Simplify right side
   105,151.07x = 8,329,824,496.14
5. Step 5: Solve for x
   x = 8,329,824,496.14/105,151.07
6. Step 6: Final answer
   x = 79,217.69