Finding the Fourth Proportional to 1,103.69, 1,523.08 and 661.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.69 : 1,523.08 = 661.59 : x
2. Step 2: Convert to fraction form
   1,103.69/1,523.08 = 661.59/x
3. Step 3: Cross multiply
   1,103.69x = 1,523.08 × 661.59
4. Step 4: Simplify right side
   1,103.69x = 1,007,654.50
5. Step 5: Solve for x
   x = 1,007,654.50/1,103.69
6. Step 6: Final answer
   x = 912.99