Finding the Fourth Proportional to 1,447.75, 1,997.78 and 818.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.75 : 1,997.78 = 818.34 : x
2. Step 2: Convert to fraction form
   1,447.75/1,997.78 = 818.34/x
3. Step 3: Cross multiply
   1,447.75x = 1,997.78 × 818.34
4. Step 4: Simplify right side
   1,447.75x = 1,634,851.25
5. Step 5: Solve for x
   x = 1,634,851.25/1,447.75
6. Step 6: Final answer
   x = 1,129.23