Finding the Fourth Proportional to 1,063.48, 1,467.56 and 621.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.48 : 1,467.56 = 621.62 : x
2. Step 2: Convert to fraction form
   1,063.48/1,467.56 = 621.62/x
3. Step 3: Cross multiply
   1,063.48x = 1,467.56 × 621.62
4. Step 4: Simplify right side
   1,063.48x = 912,264.65
5. Step 5: Solve for x
   x = 912,264.65/1,063.48
6. Step 6: Final answer
   x = 857.81