Finding the Fourth Proportional to 1,403.61, 1,936.89 and 843.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.61 : 1,936.89 = 843.98 : x
2. Step 2: Convert to fraction form
   1,403.61/1,936.89 = 843.98/x
3. Step 3: Cross multiply
   1,403.61x = 1,936.89 × 843.98
4. Step 4: Simplify right side
   1,403.61x = 1,634,686.74
5. Step 5: Solve for x
   x = 1,634,686.74/1,403.61
6. Step 6: Final answer
   x = 1,164.63