Finding the Fourth Proportional to 1,447.98, 1,998.50 and 818.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.98 : 1,998.50 = 818.51 : x
2. Step 2: Convert to fraction form
   1,447.98/1,998.50 = 818.51/x
3. Step 3: Cross multiply
   1,447.98x = 1,998.50 × 818.51
4. Step 4: Simplify right side
   1,447.98x = 1,635,778.15
5. Step 5: Solve for x
   x = 1,635,778.15/1,447.98
6. Step 6: Final answer
   x = 1,129.70