Finding the Fourth Proportional to 1,103.63, 1,523.00 and 661.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.63 : 1,523.00 = 661.57 : x
2. Step 2: Convert to fraction form
   1,103.63/1,523.00 = 661.57/x
3. Step 3: Cross multiply
   1,103.63x = 1,523.00 × 661.57
4. Step 4: Simplify right side
   1,103.63x = 1,007,568.96
5. Step 5: Solve for x
   x = 1,007,568.96/1,103.63
6. Step 6: Final answer
   x = 912.96