Finding the Fourth Proportional to 1,400.72, 1,932.48 and 811.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.72 : 1,932.48 = 811.04 : x
2. Step 2: Convert to fraction form
   1,400.72/1,932.48 = 811.04/x
3. Step 3: Cross multiply
   1,400.72x = 1,932.48 × 811.04
4. Step 4: Simplify right side
   1,400.72x = 1,567,318.58
5. Step 5: Solve for x
   x = 1,567,318.58/1,400.72
6. Step 6: Final answer
   x = 1,118.94