Finding the Fourth Proportional to 900.32, 1,241.54 and 800.42

Step by Step Solution

1. Step 1: Write the proportion equation
   900.32 : 1,241.54 = 800.42 : x
2. Step 2: Convert to fraction form
   900.32/1,241.54 = 800.42/x
3. Step 3: Cross multiply
   900.32x = 1,241.54 × 800.42
4. Step 4: Simplify right side
   900.32x = 993,750.89
5. Step 5: Solve for x
   x = 993,750.89/900.32
6. Step 6: Final answer
   x = 1,103.78