Finding the Fourth Proportional to 1,061.44, 1,590.78 and 444.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.44 : 1,590.78 = 444.98 : x
2. Step 2: Convert to fraction form
   1,061.44/1,590.78 = 444.98/x
3. Step 3: Cross multiply
   1,061.44x = 1,590.78 × 444.98
4. Step 4: Simplify right side
   1,061.44x = 707,865.28
5. Step 5: Solve for x
   x = 707,865.28/1,061.44
6. Step 6: Final answer
   x = 666.89