Finding the Fourth Proportional to 1,061.94, 1,591.53 and 445.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.94 : 1,591.53 = 445.48 : x
2. Step 2: Convert to fraction form
   1,061.94/1,591.53 = 445.48/x
3. Step 3: Cross multiply
   1,061.94x = 1,591.53 × 445.48
4. Step 4: Simplify right side
   1,061.94x = 708,994.78
5. Step 5: Solve for x
   x = 708,994.78/1,061.94
6. Step 6: Final answer
   x = 667.64