Finding the Fourth Proportional to 1,400.47, 1,933.30 and 810.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.47 : 1,933.30 = 810.89 : x
2. Step 2: Convert to fraction form
   1,400.47/1,933.30 = 810.89/x
3. Step 3: Cross multiply
   1,400.47x = 1,933.30 × 810.89
4. Step 4: Simplify right side
   1,400.47x = 1,567,692.23
5. Step 5: Solve for x
   x = 1,567,692.23/1,400.47
6. Step 6: Final answer
   x = 1,119.41