Finding the Fourth Proportional to 1,400.56, 1,932.78 and 811.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.56 : 1,932.78 = 811.24 : x
2. Step 2: Convert to fraction form
   1,400.56/1,932.78 = 811.24/x
3. Step 3: Cross multiply
   1,400.56x = 1,932.78 × 811.24
4. Step 4: Simplify right side
   1,400.56x = 1,567,948.45
5. Step 5: Solve for x
   x = 1,567,948.45/1,400.56
6. Step 6: Final answer
   x = 1,119.52