Finding the Fourth Proportional to 51,086.72, 70,500.36 and 28,730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,086.72 : 70,500.36 = 28,730.72 : x
2. Step 2: Convert to fraction form
   51,086.72/70,500.36 = 28,730.72/x
3. Step 3: Cross multiply
   51,086.72x = 70,500.36 × 28,730.72
4. Step 4: Simplify right side
   51,086.72x = 2,025,526,103.06
5. Step 5: Solve for x
   x = 2,025,526,103.06/51,086.72
6. Step 6: Final answer
   x = 39,648.78