Finding the Fourth Proportional to 2,338.72, 3,507.40 and 1,089.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.72 : 3,507.40 = 1,089.40 : x
2. Step 2: Convert to fraction form
   2,338.72/3,507.40 = 1,089.40/x
3. Step 3: Cross multiply
   2,338.72x = 3,507.40 × 1,089.40
4. Step 4: Simplify right side
   2,338.72x = 3,820,960.73
5. Step 5: Solve for x
   x = 3,820,960.73/2,338.72
6. Step 6: Final answer
   x = 1,633.78