Finding the Fourth Proportional to 1,066.55, 1,598.72 and 408.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.55 : 1,598.72 = 408.27 : x
2. Step 2: Convert to fraction form
   1,066.55/1,598.72 = 408.27/x
3. Step 3: Cross multiply
   1,066.55x = 1,598.72 × 408.27
4. Step 4: Simplify right side
   1,066.55x = 652,705.56
5. Step 5: Solve for x
   x = 652,705.56/1,066.55
6. Step 6: Final answer
   x = 611.98