Finding the Fourth Proportional to 1,400.83, 1,933.37 and 811.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.83 : 1,933.37 = 811.69 : x
2. Step 2: Convert to fraction form
   1,400.83/1,933.37 = 811.69/x
3. Step 3: Cross multiply
   1,400.83x = 1,933.37 × 811.69
4. Step 4: Simplify right side
   1,400.83x = 1,569,297.10
5. Step 5: Solve for x
   x = 1,569,297.10/1,400.83
6. Step 6: Final answer
   x = 1,120.26