Finding the Fourth Proportional to 1,061.13, 1,590.31 and 444.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.13 : 1,590.31 = 444.09 : x
2. Step 2: Convert to fraction form
   1,061.13/1,590.31 = 444.09/x
3. Step 3: Cross multiply
   1,061.13x = 1,590.31 × 444.09
4. Step 4: Simplify right side
   1,061.13x = 706,240.77
5. Step 5: Solve for x
   x = 706,240.77/1,061.13
6. Step 6: Final answer
   x = 665.56