Finding the Fourth Proportional to 105,872.61, 146,103.55 and 57,475.51

Step by Step Solution

1. Step 1: Write the proportion equation
   105,872.61 : 146,103.55 = 57,475.51 : x
2. Step 2: Convert to fraction form
   105,872.61/146,103.55 = 57,475.51/x
3. Step 3: Cross multiply
   105,872.61x = 146,103.55 × 57,475.51
4. Step 4: Simplify right side
   105,872.61x = 8,397,376,049.06
5. Step 5: Solve for x
   x = 8,397,376,049.06/105,872.61
6. Step 6: Final answer
   x = 79,315.85