Finding the Fourth Proportional to 51,084, 70,499.16 and 28,728

Step by Step Solution

1. Step 1: Write the proportion equation
   51,084 : 70,499.16 = 28,728 : x
2. Step 2: Convert to fraction form
   51,084/70,499.16 = 28,728/x
3. Step 3: Cross multiply
   51,084x = 70,499.16 × 28,728
4. Step 4: Simplify right side
   51,084x = 2,025,299,868.48
5. Step 5: Solve for x
   x = 2,025,299,868.48/51,084
6. Step 6: Final answer
   x = 39,646.46