Finding the Fourth Proportional to 105,171.36, 145,136.37 and 57,424.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105,171.36 : 145,136.37 = 57,424.69 : x
2. Step 2: Convert to fraction form
   105,171.36/145,136.37 = 57,424.69/x
3. Step 3: Cross multiply
   105,171.36x = 145,136.37 × 57,424.69
4. Step 4: Simplify right side
   105,171.36x = 8,334,411,054.98
5. Step 5: Solve for x
   x = 8,334,411,054.98/105,171.36
6. Step 6: Final answer
   x = 79,246.01