Finding the Fourth Proportional to 1,400.23, 1,932.32 and 810.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.23 : 1,932.32 = 810.78 : x
2. Step 2: Convert to fraction form
   1,400.23/1,932.32 = 810.78/x
3. Step 3: Cross multiply
   1,400.23x = 1,932.32 × 810.78
4. Step 4: Simplify right side
   1,400.23x = 1,566,686.41
5. Step 5: Solve for x
   x = 1,566,686.41/1,400.23
6. Step 6: Final answer
   x = 1,118.88