Finding the Fourth Proportional to 1,400.98, 1,933.22 and 811.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.98 : 1,933.22 = 811.55 : x
2. Step 2: Convert to fraction form
   1,400.98/1,933.22 = 811.55/x
3. Step 3: Cross multiply
   1,400.98x = 1,933.22 × 811.55
4. Step 4: Simplify right side
   1,400.98x = 1,568,904.69
5. Step 5: Solve for x
   x = 1,568,904.69/1,400.98
6. Step 6: Final answer
   x = 1,119.86