Finding the Fourth Proportional to 49,789.94, 74,509.40 and 31,078.76

Step by Step Solution

1. Step 1: Write the proportion equation
   49,789.94 : 74,509.40 = 31,078.76 : x
2. Step 2: Convert to fraction form
   49,789.94/74,509.40 = 31,078.76/x
3. Step 3: Cross multiply
   49,789.94x = 74,509.40 × 31,078.76
4. Step 4: Simplify right side
   49,789.94x = 2,315,659,760.34
5. Step 5: Solve for x
   x = 2,315,659,760.34/49,789.94
6. Step 6: Final answer
   x = 46,508.59