Finding the Fourth Proportional to 77,993.38, 107,630.45 and 42,183.28

Step by Step Solution

1. Step 1: Write the proportion equation
   77,993.38 : 107,630.45 = 42,183.28 : x
2. Step 2: Convert to fraction form
   77,993.38/107,630.45 = 42,183.28/x
3. Step 3: Cross multiply
   77,993.38x = 107,630.45 × 42,183.28
4. Step 4: Simplify right side
   77,993.38x = 4,540,204,870.72
5. Step 5: Solve for x
   x = 4,540,204,870.72/77,993.38
6. Step 6: Final answer
   x = 58,212.70