Finding the Fourth Proportional to 1,066.22, 1,471.25 and 618.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.22 : 1,471.25 = 618.09 : x
2. Step 2: Convert to fraction form
   1,066.22/1,471.25 = 618.09/x
3. Step 3: Cross multiply
   1,066.22x = 1,471.25 × 618.09
4. Step 4: Simplify right side
   1,066.22x = 909,356.01
5. Step 5: Solve for x
   x = 909,356.01/1,066.22
6. Step 6: Final answer
   x = 852.88