Finding the Fourth Proportional to 1,400.72, 1,933.65 and 811.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.72 : 1,933.65 = 811.14 : x
2. Step 2: Convert to fraction form
   1,400.72/1,933.65 = 811.14/x
3. Step 3: Cross multiply
   1,400.72x = 1,933.65 × 811.14
4. Step 4: Simplify right side
   1,400.72x = 1,568,460.86
5. Step 5: Solve for x
   x = 1,568,460.86/1,400.72
6. Step 6: Final answer
   x = 1,119.75