Finding the Fourth Proportional to 1,447.74, 1,997.98 and 818.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.74 : 1,997.98 = 818.05 : x
2. Step 2: Convert to fraction form
   1,447.74/1,997.98 = 818.05/x
3. Step 3: Cross multiply
   1,447.74x = 1,997.98 × 818.05
4. Step 4: Simplify right side
   1,447.74x = 1,634,447.54
5. Step 5: Solve for x
   x = 1,634,447.54/1,447.74
6. Step 6: Final answer
   x = 1,128.96