Finding the Fourth Proportional to 1,101.21, 1,519.47 and 659.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.21 : 1,519.47 = 659.31 : x
2. Step 2: Convert to fraction form
   1,101.21/1,519.47 = 659.31/x
3. Step 3: Cross multiply
   1,101.21x = 1,519.47 × 659.31
4. Step 4: Simplify right side
   1,101.21x = 1,001,801.77
5. Step 5: Solve for x
   x = 1,001,801.77/1,101.21
6. Step 6: Final answer
   x = 909.73