Finding the Fourth Proportional to 105,871.61, 146,102.18 and 57,474.51

Step by Step Solution

1. Step 1: Write the proportion equation
   105,871.61 : 146,102.18 = 57,474.51 : x
2. Step 2: Convert to fraction form
   105,871.61/146,102.18 = 57,474.51/x
3. Step 3: Cross multiply
   105,871.61x = 146,102.18 × 57,474.51
4. Step 4: Simplify right side
   105,871.61x = 8,397,150,918.06
5. Step 5: Solve for x
   x = 8,397,150,918.06/105,871.61
6. Step 6: Final answer
   x = 79,314.48