Finding the Fourth Proportional to 1,063.78, 1,467.96 and 621.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.78 : 1,467.96 = 621.82 : x
2. Step 2: Convert to fraction form
   1,063.78/1,467.96 = 621.82/x
3. Step 3: Cross multiply
   1,063.78x = 1,467.96 × 621.82
4. Step 4: Simplify right side
   1,063.78x = 912,806.89
5. Step 5: Solve for x
   x = 912,806.89/1,063.78
6. Step 6: Final answer
   x = 858.08