Finding the Fourth Proportional to 1,061.48, 1,590.59 and 444.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.48 : 1,590.59 = 444.85 : x
2. Step 2: Convert to fraction form
   1,061.48/1,590.59 = 444.85/x
3. Step 3: Cross multiply
   1,061.48x = 1,590.59 × 444.85
4. Step 4: Simplify right side
   1,061.48x = 707,571.10
5. Step 5: Solve for x
   x = 707,571.10/1,061.48
6. Step 6: Final answer
   x = 666.59