Finding the Fourth Proportional to 51,281.70, 70,768.78 and 28,311.54

Step by Step Solution

1. Step 1: Write the proportion equation
   51,281.70 : 70,768.78 = 28,311.54 : x
2. Step 2: Convert to fraction form
   51,281.70/70,768.78 = 28,311.54/x
3. Step 3: Cross multiply
   51,281.70x = 70,768.78 × 28,311.54
4. Step 4: Simplify right side
   51,281.70x = 2,003,573,145.72
5. Step 5: Solve for x
   x = 2,003,573,145.72/51,281.70
6. Step 6: Final answer
   x = 39,069.94