Finding the Fourth Proportional to 1,838.43, 2,536.31 and 1,209.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,838.43 : 2,536.31 = 1,209.30 : x
2. Step 2: Convert to fraction form
   1,838.43/2,536.31 = 1,209.30/x
3. Step 3: Cross multiply
   1,838.43x = 2,536.31 × 1,209.30
4. Step 4: Simplify right side
   1,838.43x = 3,067,153.20
5. Step 5: Solve for x
   x = 3,067,153.20/1,838.43
6. Step 6: Final answer
   x = 1,668.35