Finding the Fourth Proportional to 468,951.31, 647,164.84 and 287,763.37

Step by Step Solution

1. Step 1: Write the proportion equation
   468,951.31 : 647,164.84 = 287,763.37 : x
2. Step 2: Convert to fraction form
   468,951.31/647,164.84 = 287,763.37/x
3. Step 3: Cross multiply
   468,951.31x = 647,164.84 × 287,763.37
4. Step 4: Simplify right side
   468,951.31x = 186,230,333,506.15
5. Step 5: Solve for x
   x = 186,230,333,506.15/468,951.31
6. Step 6: Final answer
   x = 397,120.83