Finding the Fourth Proportional to 1,061.35, 1,590.41 and 444.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.35 : 1,590.41 = 444.72 : x
2. Step 2: Convert to fraction form
   1,061.35/1,590.41 = 444.72/x
3. Step 3: Cross multiply
   1,061.35x = 1,590.41 × 444.72
4. Step 4: Simplify right side
   1,061.35x = 707,287.14
5. Step 5: Solve for x
   x = 707,287.14/1,061.35
6. Step 6: Final answer
   x = 666.40