Finding the Fourth Proportional to 628,870.74, 867,797.82 and 356,944.17

Step by Step Solution

1. Step 1: Write the proportion equation
   628,870.74 : 867,797.82 = 356,944.17 : x
2. Step 2: Convert to fraction form
   628,870.74/867,797.82 = 356,944.17/x
3. Step 3: Cross multiply
   628,870.74x = 867,797.82 × 356,944.17
4. Step 4: Simplify right side
   628,870.74x = 309,755,372,587.71
5. Step 5: Solve for x
   x = 309,755,372,587.71/628,870.74
6. Step 6: Final answer
   x = 492,558.09