Finding the Fourth Proportional to 1,238.17, 1,708.59 and 889.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,238.17 : 1,708.59 = 889.42 : x
2. Step 2: Convert to fraction form
   1,238.17/1,708.59 = 889.42/x
3. Step 3: Cross multiply
   1,238.17x = 1,708.59 × 889.42
4. Step 4: Simplify right side
   1,238.17x = 1,519,654.12
5. Step 5: Solve for x
   x = 1,519,654.12/1,238.17
6. Step 6: Final answer
   x = 1,227.34