Finding the Fourth Proportional to 1,103.96, 1,523.43 and 661.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.96 : 1,523.43 = 661.91 : x
2. Step 2: Convert to fraction form
   1,103.96/1,523.43 = 661.91/x
3. Step 3: Cross multiply
   1,103.96x = 1,523.43 × 661.91
4. Step 4: Simplify right side
   1,103.96x = 1,008,373.55
5. Step 5: Solve for x
   x = 1,008,373.55/1,103.96
6. Step 6: Final answer
   x = 913.41