Finding the Fourth Proportional to 1,100.62, 1,651.40 and 484.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.62 : 1,651.40 = 484.78 : x
2. Step 2: Convert to fraction form
   1,100.62/1,651.40 = 484.78/x
3. Step 3: Cross multiply
   1,100.62x = 1,651.40 × 484.78
4. Step 4: Simplify right side
   1,100.62x = 800,565.69
5. Step 5: Solve for x
   x = 800,565.69/1,100.62
6. Step 6: Final answer
   x = 727.38