Finding the Fourth Proportional to 1,400.31, 1,932.27 and 810.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.31 : 1,932.27 = 810.81 : x
2. Step 2: Convert to fraction form
   1,400.31/1,932.27 = 810.81/x
3. Step 3: Cross multiply
   1,400.31x = 1,932.27 × 810.81
4. Step 4: Simplify right side
   1,400.31x = 1,566,703.84
5. Step 5: Solve for x
   x = 1,566,703.84/1,400.31
6. Step 6: Final answer
   x = 1,118.83