Finding the Fourth Proportional to 70,243.28, 105,392.56 and 30,772.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,243.28 : 105,392.56 = 30,772.72 : x
2. Step 2: Convert to fraction form
   70,243.28/105,392.56 = 30,772.72/x
3. Step 3: Cross multiply
   70,243.28x = 105,392.56 × 30,772.72
4. Step 4: Simplify right side
   70,243.28x = 3,243,215,738.96
5. Step 5: Solve for x
   x = 3,243,215,738.96/70,243.28
6. Step 6: Final answer
   x = 46,171.19