Finding the Fourth Proportional to 51,016.50, 70,403.58 and 28,660.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,016.50 : 70,403.58 = 28,660.50 : x
2. Step 2: Convert to fraction form
   51,016.50/70,403.58 = 28,660.50/x
3. Step 3: Cross multiply
   51,016.50x = 70,403.58 × 28,660.50
4. Step 4: Simplify right side
   51,016.50x = 2,017,801,804.59
5. Step 5: Solve for x
   x = 2,017,801,804.59/51,016.50
6. Step 6: Final answer
   x = 39,551.95