Finding the Fourth Proportional to 105,383.37, 145,429.06 and 57,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   105,383.37 : 145,429.06 = 57,636.72 : x
2. Step 2: Convert to fraction form
   105,383.37/145,429.06 = 57,636.72/x
3. Step 3: Cross multiply
   105,383.37x = 145,429.06 × 57,636.72
4. Step 4: Simplify right side
   105,383.37x = 8,382,053,996.26
5. Step 5: Solve for x
   x = 8,382,053,996.26/105,383.37
6. Step 6: Final answer
   x = 79,538.68