Finding the Fourth Proportional to 1,447.34, 1,997.30 and 817.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.34 : 1,997.30 = 817.88 : x
2. Step 2: Convert to fraction form
   1,447.34/1,997.30 = 817.88/x
3. Step 3: Cross multiply
   1,447.34x = 1,997.30 × 817.88
4. Step 4: Simplify right side
   1,447.34x = 1,633,551.72
5. Step 5: Solve for x
   x = 1,633,551.72/1,447.34
6. Step 6: Final answer
   x = 1,128.66