Finding the Fourth Proportional to 1,066.05, 1,598.81 and 416.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.05 : 1,598.81 = 416.79 : x
2. Step 2: Convert to fraction form
   1,066.05/1,598.81 = 416.79/x
3. Step 3: Cross multiply
   1,066.05x = 1,598.81 × 416.79
4. Step 4: Simplify right side
   1,066.05x = 666,365.94
5. Step 5: Solve for x
   x = 666,365.94/1,066.05
6. Step 6: Final answer
   x = 625.08