Finding the Fourth Proportional to 1,003.59, 1,381.91 and 889.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.59 : 1,381.91 = 889.94 : x
2. Step 2: Convert to fraction form
   1,003.59/1,381.91 = 889.94/x
3. Step 3: Cross multiply
   1,003.59x = 1,381.91 × 889.94
4. Step 4: Simplify right side
   1,003.59x = 1,229,805.63
5. Step 5: Solve for x
   x = 1,229,805.63/1,003.59
6. Step 6: Final answer
   x = 1,225.41