Finding the Fourth Proportional to 1,064.16, 1,468.56 and 622.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.16 : 1,468.56 = 622.20 : x
2. Step 2: Convert to fraction form
   1,064.16/1,468.56 = 622.20/x
3. Step 3: Cross multiply
   1,064.16x = 1,468.56 × 622.20
4. Step 4: Simplify right side
   1,064.16x = 913,738.03
5. Step 5: Solve for x
   x = 913,738.03/1,064.16
6. Step 6: Final answer
   x = 858.65