Finding the Fourth Proportional to 1,066.05, 1,598.53 and 480.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.05 : 1,598.53 = 480.55 : x
2. Step 2: Convert to fraction form
   1,066.05/1,598.53 = 480.55/x
3. Step 3: Cross multiply
   1,066.05x = 1,598.53 × 480.55
4. Step 4: Simplify right side
   1,066.05x = 768,173.59
5. Step 5: Solve for x
   x = 768,173.59/1,066.05
6. Step 6: Final answer
   x = 720.58