Finding the Fourth Proportional to 647,085.31, 892,970.46 and 352,728.58

Step by Step Solution

1. Step 1: Write the proportion equation
   647,085.31 : 892,970.46 = 352,728.58 : x
2. Step 2: Convert to fraction form
   647,085.31/892,970.46 = 352,728.58/x
3. Step 3: Cross multiply
   647,085.31x = 892,970.46 × 352,728.58
4. Step 4: Simplify right side
   647,085.31x = 314,976,203,895.58
5. Step 5: Solve for x
   x = 314,976,203,895.58/647,085.31
6. Step 6: Final answer
   x = 486,761.48