Finding the Fourth Proportional to 1,447.79, 1,997.96 and 818.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.79 : 1,997.96 = 818.42 : x
2. Step 2: Convert to fraction form
   1,447.79/1,997.96 = 818.42/x
3. Step 3: Cross multiply
   1,447.79x = 1,997.96 × 818.42
4. Step 4: Simplify right side
   1,447.79x = 1,635,156.34
5. Step 5: Solve for x
   x = 1,635,156.34/1,447.79
6. Step 6: Final answer
   x = 1,129.42