Finding the Fourth Proportional to 1,061.75, 1,591.54 and 445.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.75 : 1,591.54 = 445.79 : x
2. Step 2: Convert to fraction form
   1,061.75/1,591.54 = 445.79/x
3. Step 3: Cross multiply
   1,061.75x = 1,591.54 × 445.79
4. Step 4: Simplify right side
   1,061.75x = 709,492.62
5. Step 5: Solve for x
   x = 709,492.62/1,061.75
6. Step 6: Final answer
   x = 668.23