Finding the Fourth Proportional to 1,103.72, 1,655.82 and 400.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,103.72 : 1,655.82 = 400.76 : x
2. Step 2: Convert to fraction form
   1,103.72/1,655.82 = 400.76/x
3. Step 3: Cross multiply
   1,103.72x = 1,655.82 × 400.76
4. Step 4: Simplify right side
   1,103.72x = 663,586.42
5. Step 5: Solve for x
   x = 663,586.42/1,103.72
6. Step 6: Final answer
   x = 601.23