Finding the Fourth Proportional to 105,872.55, 146,103.51 and 57,475.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105,872.55 : 146,103.51 = 57,475.46 : x
2. Step 2: Convert to fraction form
   105,872.55/146,103.51 = 57,475.46/x
3. Step 3: Cross multiply
   105,872.55x = 146,103.51 × 57,475.46
4. Step 4: Simplify right side
   105,872.55x = 8,397,366,444.86
5. Step 5: Solve for x
   x = 8,397,366,444.86/105,872.55
6. Step 6: Final answer
   x = 79,315.80