Finding the Fourth Proportional to 2,276.39, 3,412.55 and 889.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.39 : 3,412.55 = 889.40 : x
2. Step 2: Convert to fraction form
   2,276.39/3,412.55 = 889.40/x
3. Step 3: Cross multiply
   2,276.39x = 3,412.55 × 889.40
4. Step 4: Simplify right side
   2,276.39x = 3,035,132.72
5. Step 5: Solve for x
   x = 3,035,132.72/2,276.39
6. Step 6: Final answer
   x = 1,333.31