Finding the Fourth Proportional to 1,103.65, 1,523.06 and 631.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.65 : 1,523.06 = 631.59 : x
2. Step 2: Convert to fraction form
   1,103.65/1,523.06 = 631.59/x
3. Step 3: Cross multiply
   1,103.65x = 1,523.06 × 631.59
4. Step 4: Simplify right side
   1,103.65x = 961,938.69
5. Step 5: Solve for x
   x = 961,938.69/1,103.65
6. Step 6: Final answer
   x = 871.60