Finding the Fourth Proportional to 1,447.47, 1,997.36 and 818.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.47 : 1,997.36 = 818.07 : x
2. Step 2: Convert to fraction form
   1,447.47/1,997.36 = 818.07/x
3. Step 3: Cross multiply
   1,447.47x = 1,997.36 × 818.07
4. Step 4: Simplify right side
   1,447.47x = 1,633,971.78
5. Step 5: Solve for x
   x = 1,633,971.78/1,447.47
6. Step 6: Final answer
   x = 1,128.85