Finding the Fourth Proportional to 1,190.27, 1,642.59 and 659.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,190.27 : 1,642.59 = 659.21 : x
2. Step 2: Convert to fraction form
   1,190.27/1,642.59 = 659.21/x
3. Step 3: Cross multiply
   1,190.27x = 1,642.59 × 659.21
4. Step 4: Simplify right side
   1,190.27x = 1,082,803.54
5. Step 5: Solve for x
   x = 1,082,803.54/1,190.27
6. Step 6: Final answer
   x = 909.71