Finding the Fourth Proportional to 51,216.74, 70,683.75 and 31,078.73

Step by Step Solution

1. Step 1: Write the proportion equation
   51,216.74 : 70,683.75 = 31,078.73 : x
2. Step 2: Convert to fraction form
   51,216.74/70,683.75 = 31,078.73/x
3. Step 3: Cross multiply
   51,216.74x = 70,683.75 × 31,078.73
4. Step 4: Simplify right side
   51,216.74x = 2,196,760,672.83
5. Step 5: Solve for x
   x = 2,196,760,672.83/51,216.74
6. Step 6: Final answer
   x = 42,891.46