Finding the Fourth Proportional to 628,096.56, 866,754.72 and 356,189.28

Step by Step Solution

1. Step 1: Write the proportion equation
   628,096.56 : 866,754.72 = 356,189.28 : x
2. Step 2: Convert to fraction form
   628,096.56/866,754.72 = 356,189.28/x
3. Step 3: Cross multiply
   628,096.56x = 866,754.72 × 356,189.28
4. Step 4: Simplify right side
   628,096.56x = 308,728,739,653.40
5. Step 5: Solve for x
   x = 308,728,739,653.40/628,096.56
6. Step 6: Final answer
   x = 491,530.70