Finding the Fourth Proportional to 1,447.52, 1,997.60 and 818.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.52 : 1,997.60 = 818.15 : x
2. Step 2: Convert to fraction form
   1,447.52/1,997.60 = 818.15/x
3. Step 3: Cross multiply
   1,447.52x = 1,997.60 × 818.15
4. Step 4: Simplify right side
   1,447.52x = 1,634,322.36
5. Step 5: Solve for x
   x = 1,634,322.36/1,447.52
6. Step 6: Final answer
   x = 1,129.05