Finding the Fourth Proportional to 70,213.91, 105,227.72 and 30,728.03

Step by Step Solution

1. Step 1: Write the proportion equation
   70,213.91 : 105,227.72 = 30,728.03 : x
2. Step 2: Convert to fraction form
   70,213.91/105,227.72 = 30,728.03/x
3. Step 3: Cross multiply
   70,213.91x = 105,227.72 × 30,728.03
4. Step 4: Simplify right side
   70,213.91x = 3,233,440,383.35
5. Step 5: Solve for x
   x = 3,233,440,383.35/70,213.91
6. Step 6: Final answer
   x = 46,051.28