Finding the Fourth Proportional to 1,061.48, 1,592.15 and 445.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.48 : 1,592.15 = 445.16 : x
2. Step 2: Convert to fraction form
   1,061.48/1,592.15 = 445.16/x
3. Step 3: Cross multiply
   1,061.48x = 1,592.15 × 445.16
4. Step 4: Simplify right side
   1,061.48x = 708,763.25
5. Step 5: Solve for x
   x = 708,763.25/1,061.48
6. Step 6: Final answer
   x = 667.71