Finding the Fourth Proportional to 51,439.92, 70,957.56 and 30,215.28

Step by Step Solution

1. Step 1: Write the proportion equation
   51,439.92 : 70,957.56 = 30,215.28 : x
2. Step 2: Convert to fraction form
   51,439.92/70,957.56 = 30,215.28/x
3. Step 3: Cross multiply
   51,439.92x = 70,957.56 × 30,215.28
4. Step 4: Simplify right side
   51,439.92x = 2,144,002,543.52
5. Step 5: Solve for x
   x = 2,144,002,543.52/51,439.92
6. Step 6: Final answer
   x = 41,679.74