Finding the Fourth Proportional to 1,101.89, 1,519.75 and 659.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.89 : 1,519.75 = 659.71 : x
2. Step 2: Convert to fraction form
   1,101.89/1,519.75 = 659.71/x
3. Step 3: Cross multiply
   1,101.89x = 1,519.75 × 659.71
4. Step 4: Simplify right side
   1,101.89x = 1,002,594.27
5. Step 5: Solve for x
   x = 1,002,594.27/1,101.89
6. Step 6: Final answer
   x = 909.89