Finding the Fourth Proportional to 51,084.72, 70,497.60 and 28,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,084.72 : 70,497.60 = 28,728.72 : x
2. Step 2: Convert to fraction form
   51,084.72/70,497.60 = 28,728.72/x
3. Step 3: Cross multiply
   51,084.72x = 70,497.60 × 28,728.72
4. Step 4: Simplify right side
   51,084.72x = 2,025,305,811.07
5. Step 5: Solve for x
   x = 2,025,305,811.07/51,084.72
6. Step 6: Final answer
   x = 39,646.02