Finding the Fourth Proportional to 105,632.38, 145,776.24 and 57,885.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,632.38 : 145,776.24 = 57,885.31 : x
2. Step 2: Convert to fraction form
   105,632.38/145,776.24 = 57,885.31/x
3. Step 3: Cross multiply
   105,632.38x = 145,776.24 × 57,885.31
4. Step 4: Simplify right side
   105,632.38x = 8,438,302,843.03
5. Step 5: Solve for x
   x = 8,438,302,843.03/105,632.38
6. Step 6: Final answer
   x = 79,883.68