Finding the Fourth Proportional to 1,061.16, 1,591.91 and 444.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.16 : 1,591.91 = 444.55 : x
2. Step 2: Convert to fraction form
   1,061.16/1,591.91 = 444.55/x
3. Step 3: Cross multiply
   1,061.16x = 1,591.91 × 444.55
4. Step 4: Simplify right side
   1,061.16x = 707,683.59
5. Step 5: Solve for x
   x = 707,683.59/1,061.16
6. Step 6: Final answer
   x = 666.90