Finding the Fourth Proportional to 2,388.93, 3,581.54 and 1,138.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.93 : 3,581.54 = 1,138.88 : x
2. Step 2: Convert to fraction form
   2,388.93/3,581.54 = 1,138.88/x
3. Step 3: Cross multiply
   2,388.93x = 3,581.54 × 1,138.88
4. Step 4: Simplify right side
   2,388.93x = 4,078,938.58
5. Step 5: Solve for x
   x = 4,078,938.58/2,388.93
6. Step 6: Final answer
   x = 1,707.43