Finding the Fourth Proportional to 105,743.30, 145,929.47 and 57,996.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,743.30 : 145,929.47 = 57,996.83 : x
2. Step 2: Convert to fraction form
   105,743.30/145,929.47 = 57,996.83/x
3. Step 3: Cross multiply
   105,743.30x = 145,929.47 × 57,996.83
4. Step 4: Simplify right side
   105,743.30x = 8,463,446,738.42
5. Step 5: Solve for x
   x = 8,463,446,738.42/105,743.30
6. Step 6: Final answer
   x = 80,037.67