Finding the Fourth Proportional to 54,309.20, 74,949.69 and 30,443.54

Step by Step Solution

1. Step 1: Write the proportion equation
   54,309.20 : 74,949.69 = 30,443.54 : x
2. Step 2: Convert to fraction form
   54,309.20/74,949.69 = 30,443.54/x
3. Step 3: Cross multiply
   54,309.20x = 74,949.69 × 30,443.54
4. Step 4: Simplify right side
   54,309.20x = 2,281,733,885.50
5. Step 5: Solve for x
   x = 2,281,733,885.50/54,309.20
6. Step 6: Final answer
   x = 42,013.76